https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&feed=atom&action=historyBook - Text-Book of the Embryology of Man and Mammals 16-2 - Revision history2024-03-29T13:59:51ZRevision history for this page on the wikiMediaWiki 1.39.6https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=101969&oldid=prevZ8600021: /* The Development of the Secondary Optic Cup and the, Goats of the Eye */2012-09-15T07:41:33Z<p><span dir="auto"><span class="autocomment">The Development of the Secondary Optic Cup and the, Goats of the Eye</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig270"></div></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig270"></div></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig270.jpg|<del style="font-weight: bold; text-decoration: none;">600px</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig270.jpg|<ins style="font-weight: bold; text-decoration: none;">200px</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 270. Section through the margin of the optic cup of an embryo Turdus musicus''', after KESSLER. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 270. Section through the margin of the optic cup of an embryo Turdus musicus''', after KESSLER. </div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=101968&oldid=prevZ8600021: /* The Development of the Secondary Optic Cup and the, Goats of the Eye */2012-09-15T07:41:00Z<p><span dir="auto"><span class="autocomment">The Development of the Secondary Optic Cup and the, Goats of the Eye</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 269. Section through the anterior portion of the fundament of the eye in an embryo Chick on the fifth day of incubation''', after KESSLEE. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 269. Section through the anterior portion of the fundament of the eye in an embryo Chick on the fifth day of incubation''', after KESSLEE. </div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=101966&oldid=prevZ8600021: /* The Development of the Secondary Optic Cup and the, Goats of the Eye */2012-09-15T07:40:38Z<p><span dir="auto"><span class="autocomment">The Development of the Secondary Optic Cup and the, Goats of the Eye</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===The Development of the Secondary Optic Cup and the, Goats of the Eye===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===The Development of the Secondary Optic Cup and the, Goats of the Eye===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The optic cup is further metamorphosed at the same time with </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The optic cup is further metamorphosed at the same time with <ins style="font-weight: bold; text-decoration: none;"> </ins>the layer of mesenchyma which envelops it, and which furnishes the middle and outer tunics of the eye, so that it seems to be desirable to treat of both at the same time. I begin with the stage represented in figures 266 and 269. The optic cup still possesses at this time a broad opening, in which the lens (le) is embraced. The latter is either separated from the epidermis by only an exceedingly thin sheet of mesenchyma, as in the Mammals (fig. 266), or its anterior face is in immediate contact with the epidermis, as in the Chick (fig. 269). In the beginning, therefore, there is no separate fundament for the cornea between lens and epidermis ; moreover, both the anterior chamber of the eye and the iris are wanting. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>the layer of mesenchyma which envelops it, and which furnishes the middle and outer tunics of the eye, so that it seems to be desirable to treat of both at the same time. I begin with the stage represented in figures 266 and 269. The optic cup still possesses at this time a broad opening, in which the lens (le) is embraced. The latter is either separated from the epidermis by only an exceedingly thin sheet of mesenchyma, as in the Mammals (fig. 266), or its anterior face is in immediate contact with the epidermis, as in the Chick (fig. 269). In the beginning, therefore, there is no separate fundament for the cornea between lens and epidermis ; moreover, both the anterior chamber of the eye and the iris are wanting. </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The fundament of the cornea is derived from the surrounding mesenchyma, which, as a richly cellular tissue, envelops the eyeball. In the Chick (fig. 269), as early as the fourth day, it grows in between the epidermis and the front surface of the lens as a thin sheet (bi}. At first this sheet is structureless, then numerous mesenchymatic cells migrate into it from, the margin and become the corneal corpuscles. These produce the cornea! fibres in the same way that embryonic connective-tissue cells do the connectivetissue fibres, while the structureless sheet in part goes to form the cementing substance between them, and in part is preserved on the anterior and posterior walls as thin layers destitute of cells ; these layers, undergoing chemical metamorphosis, become respectively the membrana elastica anterior and the membrane of DESCEMET.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The fundament of the cornea is derived from the surrounding mesenchyma, which, as a richly cellular tissue, envelops the eyeball. In the Chick (fig. 269), as early as the fourth day, it grows in between the epidermis and the front surface of the lens as a thin sheet (bi}. At first this sheet is structureless, then numerous mesenchymatic cells migrate into it from, the margin and become the corneal corpuscles. These produce the cornea! fibres in the same way that embryonic connective-tissue cells do the connectivetissue fibres, while the structureless sheet in part goes to form the cementing substance between them, and in part is preserved on the anterior and posterior walls as thin layers destitute of cells ; these layers, undergoing chemical metamorphosis, become respectively the membrana elastica anterior and the membrane of DESCEMET.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{|</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig269"></div></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">| </ins><div id="Fig269"></div></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig269.jpg|400px]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig269.jpg|400px]]</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>he, Corneal epithelium ; h, lens-epithelium ; h, structureless sheet of the corneal fundament ; li, embryonic connective stibstance, which envelops the optic cup and, penetrating between lensepithelium (/c) and corneal epithelium (Ac), furnishes the fundament of the cornea ; ah, outer, ib, inner layer of the secondary optic cup. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>he, Corneal epithelium ; h, lens-epithelium ; h, structureless sheet of the corneal fundament ; li, embryonic connective stibstance, which envelops the optic cup and, penetrating between lensepithelium (/c) and corneal epithelium (Ac), furnishes the fundament of the cornea ; ah, outer, ib, inner layer of the secondary optic cup. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">|</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The internal endothelium of the cornea is developed at an extraordinarily early epoch in the Chick. For as soon as the structureless sheet previously mentioned (fig. 269 A) has attained a certain thickness, mesenchymatic cells proceeding from the margin spread themselves out on its inner surface as a single-layered thin cell-membrane. With this begins also the formation of the anterior chamber of the eye. For the thin fundament of the cornea, which at first lay in immediate contact with the front surface of the lens, now becomes somewhat elevated from the latter, and separated from it by a fissure-like space filled with fluid (humor aqueus). The fissure is first observable at the margin of the secondary optic cup, and spreads out from this region toward the anterior pole of the lens. The anterior chamber of the eye does not, however, acquire a greater size and its definite form until the development of the iris. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The internal endothelium of the cornea is developed at an extraordinarily early epoch in the Chick. For as soon as the structureless sheet previously mentioned (fig. 269 A) has attained a certain thickness, mesenchymatic cells proceeding from the margin spread themselves out on its inner surface as a single-layered thin cell-membrane. With this begins also the formation of the anterior chamber of the eye. For the thin fundament of the cornea, which at first lay in immediate contact with the front surface of the lens, now becomes somewhat elevated from the latter, and separated from it by a fissure-like space filled with fluid (humor aqueus). The fissure is first observable at the margin of the secondary optic cup, and spreads out from this region toward the anterior pole of the lens. The anterior chamber of the eye does not, however, acquire a greater size and its definite form until the development of the iris. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In Mammals (fig. 266) the conditions differ somewhat from those of the Chick ; for as soon as the lens-vesicle in Mammals is fully constricted off, it is already enveloped by a thin sheet of mesenchyma (fi) with few cells, which separates it from the epidermis. The thin layer is rapidly thickened by the immigration of cells from the vicinity. Then it is separated into two layers (fig. 267), the pupillar membrane (tv) and the fundament of the cornea (A). The former is a thin, very vascular membrane lying on the anterior surface of the lens ; its network of blood-vessels communicates on the one hand posteriorly with the vessels of the vitreous body, together with which it constitutes the tunica vasculosa lentis, and on the other anastomoses at the margin of the optic cup with the vascular network of the latter. The fundament of the cornea is first sharply delimited from the pupillary membrane at the time when the anterior chamber of the eye <del style="font-weight: bold; text-decoration: none;">(&amp;) </del>is formed as a narrow fissure, which gradually increases in extent with the appearance of the iris. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In Mammals (fig. 266) the conditions differ somewhat from those of the Chick ; for as soon as the lens-vesicle in Mammals is fully constricted off, it is already enveloped by a thin sheet of mesenchyma (fi) with few cells, which separates it from the epidermis. The thin layer is rapidly thickened by the immigration of cells from the vicinity. Then it is separated into two layers (fig. 267), the pupillar membrane (tv) and the fundament of the cornea (A). The former is a thin, very vascular membrane lying on the anterior surface of the lens ; its network of blood-vessels communicates on the one hand posteriorly with the vessels of the vitreous body, together with which it constitutes the tunica vasculosa lentis, and on the other anastomoses at the margin of the optic cup with the vascular network of the latter. The fundament of the cornea is first sharply delimited from the pupillary membrane at the time when the anterior chamber of the eye <ins style="font-weight: bold; text-decoration: none;">and </ins>is formed as a narrow fissure, which gradually increases in extent with the appearance of the iris. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">|}</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig270"></div></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig270"></div></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>During those processes the condition of the optic cup itself has also changed. Its outer and inner lamellae continually become more and more unlike. The former (figs. 2G6, 2G7 pi) remains thin and composed of a single layer of cubical epithelial cells. Black pigment granules are deposited in this in increasing abundance, until finally the whole lamella appears upon sections as a black streak. The inner layer (?), on the contrary, remains entirely free from pigment, with the exception of a part of the marginal zone ; the cells, as in the wall of the brain vesicles, become elongated and spindleshaped, and lie in many superposed layers. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>During those processes the condition of the optic cup itself has also changed. Its outer and inner lamellae continually become more and more unlike. The former (figs. 2G6, 2G7 pi) remains thin and composed of a single layer of cubical epithelial cells. Black pigment granules are deposited in this in increasing abundance, until finally the whole lamella appears upon sections as a black streak. The inner layer (?), on the contrary, remains entirely free from pigment, with the exception of a part of the marginal zone ; the cells, as in the wall of the brain vesicles, become elongated and spindleshaped, and lie in many superposed layers. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Moreover the bottom of the cup and its rim assume different conditions, and hasten to fulfil different destinies; the former is converted into the retina, the latter is principally concerned in the production of the ciliary body and the iris. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Moreover the bottom of the cup and its rim assume different conditions, and hasten to fulfil different destinies; the former is converted into the retina, the latter is principally concerned in the production of the ciliary body and the iris. </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The edge of the cup (fig. 267 rz, fig. 270*, and fig. 271) becomes very much reduced in thickness by the cells of its inner layer arranging themselves in a single sheet, remaining for a time cylindrical, and then assuming a cubical form. But with its reduction in thickness there goes hand in hand an increase in its superficial extent. Consequently the margin of the optic cup now grows into the anterior chamber of the eye between cornea and tbe anterior surface of the lens, until it has nearly reached the middle of the latter. Then it at last bounds only a small orifice which leads into the cavity of the optic cup the pupil. The pigment layer of the iris is derived from the marginal region of the cup, as KESSLER first showed (fig. 270 l and 2 ). Pigment granules are now deposited in the inner epithelial layer, just as in the outer lamella, so that at last the two are no longer distinguishable as separate layers. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The edge of the cup (fig. 267 rz, fig. 270*, and fig. 271) becomes very much reduced in thickness by the cells of its inner layer arranging themselves in a single sheet, remaining for a time cylindrical, and then assuming a cubical form. But with its reduction in thickness there goes hand in hand an increase in its superficial extent. Consequently the margin of the optic cup now grows into the anterior chamber of the eye between cornea and tbe anterior surface of the lens, until it has nearly reached the middle of the latter. Then it at last bounds only a small orifice which leads into the cavity of the optic cup the pupil. The pigment layer of the iris is derived from the marginal region of the cup, as KESSLER first showed (fig. 270 l and 2 ). Pigment granules are now deposited in the inner epithelial layer, just as in the outer lamella, so that at last the two are no longer distinguishable as separate layers. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The mesenchymatic layer which envelops the two epithelial lamella keeps pace with them in their superficial extension. It becomes thickened and furnishes the stroma of the iris with its abundant non-striated muscles and blood-vessels (fig. 270 s ). In Mammals (fig. 267 x) this is for a time continuous with the tunica vasculosa lentis (tv), in consequence of which the pupil in embryos is closed by a thin vascular connective - tissue membrane, as has already been stated. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The mesenchymatic layer which envelops the two epithelial lamella keeps pace with them in their superficial extension. It becomes thickened and furnishes the stroma of the iris with its abundant non-striated muscles and blood-vessels (fig. 270 s ). In Mammals (fig. 267 x) this is for a time continuous with the tunica vasculosa lentis (tv), in consequence of which the pupil in embryos is closed by a thin vascular connective-tissue membrane, as has already been stated. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The part of the optic cup which is adjacent to the pigment layer of the iris and surrounds the equator of the lens, and which likewise belongs to the attenuated marginal zone of the cup (fig. 270 c<del style="font-weight: bold; text-decoration: none;">&amp;</del>), undergoes an interesting alteration. In conjunction with the neighboring layer of connective substance, it is converted into the ciliary body of the eye. This process begins in the Chick on the </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The part of the optic cup which is adjacent to the pigment layer of the iris and surrounds the equator of the lens, and which likewise belongs to the attenuated marginal zone of the cup (fig. 270 c), undergoes an interesting alteration. In conjunction with the neighboring layer of connective substance, it is converted into the ciliary body of the eye. This process begins in the Chick on the ninth or tenth day of incubation (KESSLER), in Man at the end of the second or beginning of the third month (KOLLIKER). The attenuated epithelial double lamella of the cup, in consequence of an especially vigorous growth in area, is laid into numerous, [nearly] parallel short folds, which are arranged radially around the equator of the lens. As in the iris, so here, the adjacent mesenchymatic layer participates in the growth and penetrates between the folds in the form of fine processes. A cross section through the foldeel part of the optic cup of a Cat embryo 10 cm. long (fig. 271) affords information concerning the original form of these processes in Mammals. It shows that the individual folds are very thin and enclose within them only a very small amount of embryonic connective tissue (bi ') with fine capillaries, and that, unlike the pigment epithelium of the iris, only the outer of the two epithelial layers (ab) is pigmented, whereas the inner (ib) remains unpigmented even later and is composed of cylindrical cells. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>ninth or tenth day of incubation (KESSLER), in Man at the end of the second or beginning of the third month (KOLLIKER). The attenuated epithelial double lamella of the cup, in consequence of an especially vigorous growth in area, is laid into numerous, [nearly] parallel short folds, which are arranged radially around the equator of the lens. As in the iris, so here, the adjacent mesenchymatic layer participates in the growth and penetrates between the folds in the form of fine processes. A cross section through the foldeel part of the optic cup of a Cat embryo 10 cm. long (fig. 271) affords information concerning the original form of these processes in Mammals. It shows that the individual folds are very thin and enclose within them only a very small amount of embryonic connective tissue (bi ') with fine capillaries, and that, unlike the pigment epithelium of the iris, only the outer of the two epithelial layers (ab) is pigmented, whereas the inner (ib) remains unpigmented even later and is composed of cylindrical cells. </div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig271"></div></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig271"></div></div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=101965&oldid=prevZ8600021: /* The Development of the Secondary Optic Cup and the, Goats of the Eye */2012-09-15T07:38:44Z<p><span dir="auto"><span class="autocomment">The Development of the Secondary Optic Cup and the, Goats of the Eye</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:38, 15 September 2012</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 269. Section through the anterior portion of the fundament of the eye in an embryo Chick on the fifth day of incubation''', after KESSLEE. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 269. Section through the anterior portion of the fundament of the eye in an embryo Chick on the fifth day of incubation''', after KESSLEE. </div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Occasionally in Man the normal course of development is interrupted, so that the margins of the choroid fissure remain apart. The usual consequence of this is a defective development of the vascular tunic of the eye at the corresponding place an indication of the extent to which the development of the connective-tissue envelope is dependent on the formative processes of the two epithelial layers, as has already been stated. Both retinal and choroidal pigment are therefore wanting along a streak which begins at the optic nerve, so that the white solera of the eye shows through to the inside and can be recognised in examinations with the ophthalmoscope. When the defect reaches forward to the margin of the pupil, a fissure is formed in the iris which is easily recognised upon external observation of the eye. The two structures resulting from this interrupted development are distinguished from each other as choroidal and iridal fissures (coloboma choroidere and coloboma iridis). </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Occasionally in Man the normal course of development is interrupted, so that the margins of the choroid fissure remain apart. The usual consequence of this is a defective development of the vascular tunic of the eye at the corresponding place an indication of the extent to which the development of the connective-tissue envelope is dependent on the formative processes of the two epithelial layers, as has already been stated. Both retinal and choroidal pigment are therefore wanting along a streak which begins at the optic nerve, so that the white solera of the eye shows through to the inside and can be recognised in examinations with the ophthalmoscope. When the defect reaches forward to the margin of the pupil, a fissure is formed in the iris which is easily recognised upon external observation of the eye. The two structures resulting from this interrupted development are distinguished from each other as choroidal and iridal fissures (coloboma choroidere and coloboma iridis).</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===The Development of the Optic Nerve===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===The Development of the Optic Nerve===</div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=88162&oldid=prevZ8600021: /* The Development of the Eye */2012-03-28T11:38:56Z<p><span dir="auto"><span class="autocomment">The Development of the Eye</span></span></p>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig264.jpg|600px]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig264.jpg|600px]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Fig. 264. Two diagrams illustrating the development of the eye. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">'''</ins>Fig. 264. Two diagrams illustrating the development of the eye.<ins style="font-weight: bold; text-decoration: none;">''' </ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* </ins>A, The primary optic vesicle (au), joined by a hollow </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A, The primary optic vesicle (au), joined by a hollow </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>stalk (st) to the between-brain (zh), is invaginated as a result of the development of the lens-pit (Ig). </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>stalk (st) to the between-brain (zh), is invaginated as a result of the development of the lens-pit (Ig). </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* </ins>B, The lens-pit has become abstricted to form a lens</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>B, The lens-pit has become abstricted to form a lens</div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>vesicle (Is). From the optic vesicle has arisen the optic cup with double walls, an inner (ib) and an outer (ab) ; 1st, stalk of the lens ; gl, vitreous body. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>vesicle (Is). From the optic vesicle has arisen the optic cup with double walls, an inner (ib) and an outer (ab) ; 1st, stalk of the lens ; gl, vitreous body. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig265.jpg|600px]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig265.jpg|600px]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Fig. 265. Plastic representation of the optic cup with lens and vitreous body. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">'''</ins>Fig. 265. Plastic representation of the optic cup with lens and vitreous body.<ins style="font-weight: bold; text-decoration: none;">''' </ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>o.b, Outer wall of the cup ; lb, its inner wall ; h, cavity between the two walls, which later disappears entirely ; Sn, fundament of the optic nerve. (Stalk of the optic vesicle with a furrow on its lower surface.) aus, Optic [choroid] fissure ; yl, vitreous body ; I, lens. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">:</ins>o.b, Outer wall of the cup ; lb, its inner wall ; h, cavity between the two walls, which later disappears entirely ; Sn, fundament of the optic nerve. (Stalk of the optic vesicle with a furrow on its lower surface.) aus, Optic [choroid] fissure ; yl, vitreous body ; I, lens. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 267. Part of a section through the fundament of the eye of an embryo Mouse.''' Somewhat older stage than that shown in fig. 266. After KESSLER. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 267. Part of a section through the fundament of the eye of an embryo Mouse.''' Somewhat older stage than that shown in fig. 266. After KESSLER. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A part of the lens, the rim of the optic cup, the cornea, and the anterior chamber of the eye. pi, 1'igmented epithelium of the eye ; r, retina ; rz, marginal zone of the optic cup; y, bloodvessels of the vitreous body in the vascular capsule of the lens ; tv, tunica vasculosa lentis ; x, connection of the latter with the choroid membrane of the eye ; I', transition of the lensepithelium into the lens-fibres ; Ic, lens-epithelium ; k, anterior chamber of the eye ; d, <del style="font-weight: bold; text-decoration: none;">DJESCEMET</del>'<del style="font-weight: bold; text-decoration: none;">S </del>membrane ; //, cornea ; he, corneal epithelium. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A part of the lens, the rim of the optic cup, the cornea, and the anterior chamber of the eye. pi, 1'igmented epithelium of the eye ; r, retina ; rz, marginal zone of the optic cup; y, bloodvessels of the vitreous body in the vascular capsule of the lens ; tv, tunica vasculosa lentis ; x, connection of the latter with the choroid membrane of the eye ; I', transition of the lensepithelium into the lens-fibres ; Ic, lens-epithelium ; k, anterior chamber of the eye ; d, <ins style="font-weight: bold; text-decoration: none;">Descemet</ins>'<ins style="font-weight: bold; text-decoration: none;">s </ins>membrane ; //, cornea ; he, corneal epithelium. </div></td></tr>
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</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55939&oldid=prevS8600021: /* The Development of the Organ of Smell */2011-05-20T02:01:49Z<p><span dir="auto"><span class="autocomment">The Development of the Organ of Smell</span></span></p>
<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55939&oldid=55935">Show changes</a>S8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55935&oldid=prevS8600021: /* The Development of the Organ of Hearing */2011-05-20T01:49:25Z<p><span dir="auto"><span class="autocomment">The Development of the Organ of Hearing</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:49, 20 May 2011</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| A more extended discussion of the development of the auditory ossicles will be deferred to a subsequent section, which deals with the origin of the skeleton. At present, only a few words further concerning the formation of the external ear, which, as has already been stated, is derived from a depression on the outer side of the place of closure of the first visceral cleft. Its development has been minutely investigated in the Chick by MOLDENHAUER and in the human embryo by His. As the lateral view of a very young human embryo (fig. 274) shows, the first visceral cleft is surrounded by ridge-like margins, which belong to the first and second visceral arches, and are early divided into six elevations designated by Arabic numerals. From these is derived the auricle, which therefore involves a rather extensive tract of the embryonic head (the pars auricularis). The pocket between the ridges, at the bottom of which the tympanic membrane is met with, becomes the external meatus, This is continually growing deeper owing to the surrounding wall of the side of the face becoming greatly thickened ; finally it is developed into a long canal, the wall of which is in part bony, in part cartilaginous. The six elevations mentioned, which surround the orifice of the external ineatus, together constitute a bulky ring. The accompanying representation (fig. 285) shows clearly its metamorphosis into the external ear. It shows that out of the elevations 1 and 5 the tragus and antitrasrus are developed, out of 2 and 3 the helix, and out of 4 the antihelix. The lobule of the ear remains for a long time small ; it is not until the fifth month that it becomes more distinct. It is derived from the hillock marked with the numeral 6. At the close of the second month all the essential parts of the external ear are easily recognisable ; from the third month onward tho upper and posterior part of the auricle grows out more from the surface of the head ; and it acquires greater firmness upon the differentiation of the auricular cartilage, which had already begun at the end of the second month,</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| A more extended discussion of the development of the auditory ossicles will be deferred to a subsequent section, which deals with the origin of the skeleton. At present, only a few words further concerning the formation of the external ear, which, as has already been stated, is derived from a depression on the outer side of the place of closure of the first visceral cleft. Its development has been minutely investigated in the Chick by MOLDENHAUER and in the human embryo by His. As the lateral view of a very young human embryo (fig. 274) shows, the first visceral cleft is surrounded by ridge-like margins, which belong to the first and second visceral arches, and are early divided into six elevations designated by Arabic numerals. From these is derived the auricle, which therefore involves a rather extensive tract of the embryonic head (the pars auricularis). The pocket between the ridges, at the bottom of which the tympanic membrane is met with, becomes the external meatus, This is continually growing deeper owing to the surrounding wall of the side of the face becoming greatly thickened ; finally it is developed into a long canal, the wall of which is in part bony, in part cartilaginous. The six elevations mentioned, which surround the orifice of the external ineatus, together constitute a bulky ring. The accompanying representation (fig. 285) shows clearly its metamorphosis into the external ear. It shows that out of the elevations 1 and 5 the tragus and antitrasrus are developed, out of 2 and 3 the helix, and out of 4 the antihelix. The lobule of the ear remains for a long time small ; it is not until the fifth month that it becomes more distinct. It is derived from the hillock marked with the numeral 6. At the close of the second month all the essential parts of the external ear are easily recognisable ; from the third month onward tho upper and posterior part of the auricle grows out more from the surface of the head ; and it acquires greater firmness upon the differentiation of the auricular cartilage, which had already begun at the end of the second month,</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| <div id="Fig285"></div></div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| <div id="Fig285"></div></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig285.jpg|<del style="font-weight: bold; text-decoration: none;">400px</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig285.jpg|<ins style="font-weight: bold; text-decoration: none;">300px</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td></tr>
</table>S8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55934&oldid=prevS8600021: /* The Development of the Organ of Hearing */2011-05-20T01:48:40Z<p><span dir="auto"><span class="autocomment">The Development of the Organ of Hearing</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:48, 20 May 2011</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l539">Line 539:</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>With a reduction in the thickness of the tympanic membrane there occurs a condensation of its connective-tissue substance, whereby it is enabled to fulfil its ultimate function as a vibrating membrane. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>With a reduction in the thickness of the tympanic membrane there occurs a condensation of its connective-tissue substance, whereby it is enabled to fulfil its ultimate function as a vibrating membrane. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A more extended discussion of the development of the auditory ossicles will be deferred to a subsequent section, which deals with the origin of the skeleton. At present, only a few words further concerning the formation of the external ear, which, as has already been stated, is derived from a depression on the outer side of the place of closure of the first visceral cleft. Its development has been minutely investigated in the Chick by MOLDENHAUER and in the human embryo by His. As the lateral view of a very young human embryo (fig. 274) shows, the first visceral cleft is surrounded by ridge-like margins, which belong to the first and second visceral arches, and are early divided into six elevations designated by Arabic numerals. From these is derived the auricle, which therefore involves a rather extensive tract of the embryonic head (the pars auricularis). The pocket between the ridges, at the bottom of which the tympanic membrane is met with, becomes the external meatus, This is continually growing deeper owing to the surrounding wall of the side of the face becoming greatly thickened ; finally it is developed into a long canal, the wall of which is in part bony, in part cartilaginous. The six elevations mentioned, which surround the orifice of the external ineatus, together constitute a bulky ring. The accompanying representation (fig. 285) shows clearly its metamorphosis into the external ear. It shows that out of the elevations 1 and 5 the tragus and antitrasrus are developed, out of 2 and 3 the helix, and out of 4 the antihelix. The lobule of the ear remains for a long time small ; it is not until the fifth month that it becomes more distinct. It is derived from the hillock marked with the numeral 6. At the close of the second month all the essential parts of the external ear are easily recognisable ; from the third month onward tho upper and posterior part of the auricle grows out more from the surface of the head ; and it acquires greater firmness upon the differentiation of the auricular cartilage, which had already begun at the end of the second month,</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{|</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">| </ins>A more extended discussion of the development of the auditory ossicles will be deferred to a subsequent section, which deals with the origin of the skeleton. At present, only a few words further concerning the formation of the external ear, which, as has already been stated, is derived from a depression on the outer side of the place of closure of the first visceral cleft. Its development has been minutely investigated in the Chick by MOLDENHAUER and in the human embryo by His. As the lateral view of a very young human embryo (fig. 274) shows, the first visceral cleft is surrounded by ridge-like margins, which belong to the first and second visceral arches, and are early divided into six elevations designated by Arabic numerals. From these is derived the auricle, which therefore involves a rather extensive tract of the embryonic head (the pars auricularis). The pocket between the ridges, at the bottom of which the tympanic membrane is met with, becomes the external meatus, This is continually growing deeper owing to the surrounding wall of the side of the face becoming greatly thickened ; finally it is developed into a long canal, the wall of which is in part bony, in part cartilaginous. The six elevations mentioned, which surround the orifice of the external ineatus, together constitute a bulky ring. The accompanying representation (fig. 285) shows clearly its metamorphosis into the external ear. It shows that out of the elevations 1 and 5 the tragus and antitrasrus are developed, out of 2 and 3 the helix, and out of 4 the antihelix. The lobule of the ear remains for a long time small ; it is not until the fifth month that it becomes more distinct. It is derived from the hillock marked with the numeral 6. At the close of the second month all the essential parts of the external ear are easily recognisable ; from the third month onward tho upper and posterior part of the auricle grows out more from the surface of the head ; and it acquires greater firmness upon the differentiation of the auricular cartilage, which had already begun at the end of the second month,</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div id="Fig285"></div></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">| </ins><div id="Fig285"></div></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig285.jpg|<del style="font-weight: bold; text-decoration: none;">600px</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[File:Hertwig285.jpg|<ins style="font-weight: bold; text-decoration: none;">400px</ins>]]</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The elevation marked 1 produces the tragus ; 5, the antitragus. The elevations 2 and 3 produce the helix ; 4, the antihelix. From the tract 6 is formed the lobule. K, Lower jaw. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The elevation marked 1 produces the tragus ; 5, the antitragus. The elevations 2 and 3 produce the helix ; 4, the antihelix. From the tract 6 is formed the lobule. K, Lower jaw. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">|}</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Summary===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Summary===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
</table>S8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55933&oldid=prevS8600021: /* The Development of the Organ of Hearing */2011-05-20T01:47:34Z<p><span dir="auto"><span class="autocomment">The Development of the Organ of Hearing</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en-GB">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:47, 20 May 2011</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 285. Fundament of the outer ear of a human embryo''', after His. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The elevation marked 1 produces the tragus ; 5, the antitragus. The elevations 2 and 3 produce the helix ; 4, the antihelix. From the <del style="font-weight: bold; text-decoration: none;">ti'act (3 </del>is formed the lobule. <del style="font-weight: bold; text-decoration: none;">A"</del>, Lower jaw. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The elevation marked 1 produces the tragus ; 5, the antitragus. The elevations 2 and 3 produce the helix ; 4, the antihelix. From the <ins style="font-weight: bold; text-decoration: none;">tract 6 </ins>is formed the lobule. <ins style="font-weight: bold; text-decoration: none;">K</ins>, Lower jaw. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Summary===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Summary===</div></td></tr>
</table>S8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=Book_-_Text-Book_of_the_Embryology_of_Man_and_Mammals_16-2&diff=55931&oldid=prevS8600021: /* The Development of the Otocyst into the Labyrinth */2011-05-20T01:42:54Z<p><span dir="auto"><span class="autocomment">The Development of the Otocyst into the Labyrinth</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 12:42, 20 May 2011</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l501">Line 501:</td>
<td colspan="2" class="diff-lineno">Line 501:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 283. Part of a section through the cochlea of an embryo Cat 9 cm. long''', after BOETTCHER. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Fig. 283. Part of a section through the cochlea of an embryo Cat 9 cm. long''', after BOETTCHER. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>kk, Cartilaginous capsule, in which the cochlear duct describes ascending spiral turns; dc, ductus cochleares ; C, organ of Coim ; ie, lamina vestibularis ; x, outer wall of the membranous ductus cochlearis with ligamentum spirale ; <del style="font-weight: bold; text-decoration: none;">&lt;ST</del>, scala vestibuli ; ST, ST', scala tympani ; g, gelatinous tissue, which still fills the scala vestibuli (<del style="font-weight: bold; text-decoration: none;">.si/</del>) in its last turns ; <del style="font-weight: bold; text-decoration: none;">//</del>, remnant of the gelatinous tissue, which is not yet liquefied ; M, firm connective tissue surrounding the cochlear nerve (nc) ; gsp, ganglion spirale ; N, nerve which runs to CORTI'S organ in the future lamina spiralis ossea ; Y, compact connective-tissue layer, which becomes ossified and shares in bounding the bony cochlear duct ; P, perichondrium. </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">:</ins>kk, Cartilaginous capsule, in which the cochlear duct describes ascending spiral turns; dc, ductus cochleares ; C, organ of Coim ; ie, lamina vestibularis ; x, outer wall of the membranous ductus cochlearis with ligamentum spirale ; <ins style="font-weight: bold; text-decoration: none;">SV</ins>, scala vestibuli ; ST, ST', scala tympani ; g, gelatinous tissue, which still fills the scala vestibuli (<ins style="font-weight: bold; text-decoration: none;">sv'</ins>) in its last turns ; <ins style="font-weight: bold; text-decoration: none;">g'</ins>, remnant of the gelatinous tissue, which is not yet liquefied ; M, firm connective tissue surrounding the cochlear nerve (nc) ; gsp, ganglion spirale ; N, nerve which runs to CORTI'S organ in the future lamina spiralis ossea ; Y, compact connective-tissue layer, which becomes ossified and shares in bounding the bony cochlear duct ; P, perichondrium. </div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">+++++++++++++++++++++++++++++++++++++++++</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
</table>S8600021