https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&feed=atom&action=history1897 Human Embryology 28 - Revision history2024-03-29T06:01:08ZRevision history for this page on the wikiMediaWiki 1.39.6https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=183383&oldid=prevZ8600021 at 14:09, 25 June 20152015-06-25T14:09:29Z<p></p>
<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=183383&oldid=182423">Show changes</a>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182423&oldid=prevZ8600021: /* 1. Origin of the Otocyst */2015-06-17T23:00:50Z<p><span dir="auto"><span class="autocomment">1. Origin of the Otocyst</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" 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>which <del style="font-weight: bold; text-decoration: none;">joio </del>the ganglion ; <del style="font-weight: bold; text-decoration: none;">compHre </del>the history of the olfactory ganglion, |t, H37. The lower portion bood changes its configuration, and in a human embrj-o of about four weeks was found by Kolliker (" Entwickehingsgos.." 2te Aufl.), to have a new rounded protuberance behind and a little outside the base of the recessus, which marks the situation of the future vestibule ; some traces of the Bemieircular canals were alreatly indicated; the lower end of the pear was somewhat elongated preparatory to the outgrowth of the cochlea. The irtocvsts at this time lie near the middle of the hind-brain. Figs, in, D, and 3:J8, ot; Ep iis seen in cross sections,</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>which <ins style="font-weight: bold; text-decoration: none;">join </ins>the ganglion ; <ins style="font-weight: bold; text-decoration: none;">compare </ins>the history of the olfactory ganglion, |t, H37. The lower portion bood changes its configuration, and in a human embrj-o of about four weeks was found by Kolliker (" Entwickehingsgos.." 2te Aufl.), to have a new rounded protuberance behind and a little outside the base of the recessus, which marks the situation of the future vestibule ; some traces of the Bemieircular canals were alreatly indicated; the lower end of the pear was somewhat elongated preparatory to the outgrowth of the cochlea. The irtocvsts at this time lie near the middle of the hind-brain. Figs, in, D, and 3:J8, ot; Ep iis seen in cross sections,</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;"><div>^ Fig. 4^2, of the head the otocysts are pear-shaped and</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. 4^2, of the head the otocysts are pear-shaped and</div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182421&oldid=prevZ8600021: /* 1. Origin of the Otocyst */2015-06-17T23:00:32Z<p><span dir="auto"><span class="autocomment">1. Origin of the Otocyst</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 mouth of the pit very Hoon cUeeB over, and tlio inva{$ii)Htiun becomes a closed sac, which quickly loses its connection with thu ectoclerm, making a separate spheroidai venicle, tho crtocyrt, Fife- 4 1 tt, B, of. Tlio sac is lined by Ji quite thick epithelium, which contains the nuclei scati«rod at various levels, Fig. 420, and is built up apparently of slender columnar cells, bellied out M'licre each cell contains its nucleus. As yet the oinVnyonic connective tissue (mesodenn) has f urn led no envelope around the epithelium, l>ui liitcr tho cells about the vesicle condense around it and ctjnstituto a sub-epithelial membrane. Tho epithelium retains its cylindrical form over and immediately on the bordersoC all the areas, where the sensorj- hair-cells or socalled auilit<>r>' cfdls are developed; over all the remaining portions it y^ ^^ -H(Tt»«ui ultimately thins out, be- {^""'"^V^L '"-"K comingeitberacubriidal ""™"' '■■'■- >— or a pavement epithelium. In fislies there are Hev<-[i ; in MmijIiibianH, reptitex, and Viinls eight, in man only six, of tli(M<; anaut of ntnmtry cells. It is desirable to call attention X»> this ibinninK out, iMMraiitXf it is usual to find it stated that a thickmiing ariH't), when, in nrality, it is the thinning of ailjacfnt jiurtH wbifji effects tlw diffentiitiation, and though there may l>i; ati abholuti^ tbick'-nirigaWi, yet the thinning n^und al^out in tli<: j/riiicifKil fa/:tt)T.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The mouth of the pit very Hoon cUeeB over, and tlio inva{$ii)Htiun becomes a closed sac, which quickly loses its connection with thu ectoclerm, making a separate spheroidai venicle, tho crtocyrt, Fife- 4 1 tt, B, of. Tlio sac is lined by Ji quite thick epithelium, which contains the nuclei scati«rod at various levels, Fig. 420, and is built up apparently of slender columnar cells, bellied out M'licre each cell contains its nucleus. As yet the oinVnyonic connective tissue (mesodenn) has f urn led no envelope around the epithelium, l>ui liitcr tho cells about the vesicle condense around it and ctjnstituto a sub-epithelial membrane. Tho epithelium retains its cylindrical form over and immediately on the bordersoC all the areas, where the sensorj- hair-cells or socalled auilit<>r>' cfdls are developed; over all the remaining portions it y^ ^^ -H(Tt»«ui ultimately thins out, be- {^""'"^V^L '"-"K comingeitberacubriidal ""™"' '■■'■- >— or a pavement epithelium. In fislies there are Hev<-[i ; in MmijIiibianH, reptitex, and Viinls eight, in man only six, of tli(M<; anaut of ntnmtry cells. It is desirable to call attention X»> this ibinninK out, iMMraiitXf it is usual to find it stated that a thickmiing ariH't), when, in nrality, it is the thinning of ailjacfnt jiurtH wbifji effects tlw diffentiitiation, and though there may l>i; ati abholuti^ tbick'-nirigaWi, yet the thinning n^und al^out in tli<: j/riiicifKil fa/:tt)T.</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>2. Bececsua Veatibtili.— <del style="font-weight: bold; text-decoration: none;">'J'be t/u>c>'»t n';xt I'jwet* its Bpb<fri<al fonn by the devel<f|>ment of a ppfloiigation <fti ilidorhal sid*?, in c^^swjmfli'-*; of which' it, acjuir<;HS<>m«wliatof a jrfsur K)iaif<;. TtiitemuAwriiu-uiX gangli'm it in a<.-tual tact. »:• !-tat*<I p. '"A*"', with the autftrViT wall of ll»*; 'A*M'\tt, ai*'J it it: jir-.'bcible by anal(.ig>' that the oloc>'>ftJc epitlicliuin givm 'M 'nzW^.,</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>2. Bececsua Veatibtili.— </div></td></tr>
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</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182419&oldid=prevZ8600021: /* 1. Origin of the Otocyst */2015-06-17T23:00:11Z<p><span dir="auto"><span class="autocomment">1. Origin of the Otocyst</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 10:00, 18 June 2015</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l338">Line 338:</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>The mouth of the pit very Hoon cUeeB over, and tlio inva{$ii)Htiun becomes a closed sac, which quickly loses its connection with thu ectoclerm, making a separate spheroidai venicle, tho crtocyrt, Fife- 4 1 tt, B, of. Tlio sac is lined by Ji quite thick epithelium, which contains the nuclei scati«rod at various levels, Fig. 420, and is built up apparently of slender columnar cells, bellied out M'licre each cell contains its nucleus. As yet the oinVnyonic connective tissue (mesodenn) has f urn led no envelope around the epithelium, l>ui liitcr tho cells about the vesicle condense around it and ctjnstituto a sub-epithelial membrane. Tho epithelium retains its cylindrical form over and immediately on the bordersoC all the areas, where the sensorj- hair-cells or socalled auilit<>r>' cfdls are developed; over all the remaining portions it y^ ^^ -H(Tt»«ui ultimately thins out, be- {^""'"^V^L '"-"K comingeitberacubriidal ""™"' '■■'■- >— or a pavement epithelium. In fislies there are Hev<-[i ; in MmijIiibianH, reptitex, and Viinls eight, in man only six, of tli(M<; anaut of ntnmtry cells. It is desirable to call attention X»> this ibinninK out, iMMraiitXf it is usual to find it stated that a thickmiing ariH't), when, in nrality, it is the thinning of ailjacfnt jiurtH wbifji effects tlw diffentiitiation, and though there may l>i; ati abholuti^ tbick'-nirigaWi, yet the thinning n^und al^out in tli<: j/riiicifKil fa/:tt)T.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The mouth of the pit very Hoon cUeeB over, and tlio inva{$ii)Htiun becomes a closed sac, which quickly loses its connection with thu ectoclerm, making a separate spheroidai venicle, tho crtocyrt, Fife- 4 1 tt, B, of. Tlio sac is lined by Ji quite thick epithelium, which contains the nuclei scati«rod at various levels, Fig. 420, and is built up apparently of slender columnar cells, bellied out M'licre each cell contains its nucleus. As yet the oinVnyonic connective tissue (mesodenn) has f urn led no envelope around the epithelium, l>ui liitcr tho cells about the vesicle condense around it and ctjnstituto a sub-epithelial membrane. Tho epithelium retains its cylindrical form over and immediately on the bordersoC all the areas, where the sensorj- hair-cells or socalled auilit<>r>' cfdls are developed; over all the remaining portions it y^ ^^ -H(Tt»«ui ultimately thins out, be- {^""'"^V^L '"-"K comingeitberacubriidal ""™"' '■■'■- >— or a pavement epithelium. In fislies there are Hev<-[i ; in MmijIiibianH, reptitex, and Viinls eight, in man only six, of tli(M<; anaut of ntnmtry cells. It is desirable to call attention X»> this ibinninK out, iMMraiitXf it is usual to find it stated that a thickmiing ariH't), when, in nrality, it is the thinning of ailjacfnt jiurtH wbifji effects tlw diffentiitiation, and though there may l>i; ati abholuti^ tbick'-nirigaWi, yet the thinning n^und al^out in tli<: j/riiicifKil fa/:tt)T.</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>2. Bececsua Veatibtili.— 'J'be t/u></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>2. Bececsua Veatibtili.— 'J'be t/u>c>'»t n';xt I'jwet* its Bpb<fri<al fonn by <ins style="font-weight: bold; text-decoration: none;">the </ins>devel<f|>ment of a ppfloiigation <fti <ins style="font-weight: bold; text-decoration: none;">ilidorhal </ins>sid*?, in c^^swjmfli'-*; of which' it, acjuir<;HS<>m«wliatof a jrfsur K)iaif<;. <ins style="font-weight: bold; text-decoration: none;">TtiitemuAwriiu</ins>-uiX gangli'm it in a<.-tual <ins style="font-weight: bold; text-decoration: none;"> </ins>tact. »:• !-tat*<I p. '"A*"', with the autftrViT wall of ll»*; 'A*M'\tt, ai*'J it it: jir-.'bcible by anal(.ig>' that the oloc>'>ftJc epitlicliuin givm 'M 'nzW^.,</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>c>'»t n';xt I'jwet* its Bpb<fri<al fonn by <del style="font-weight: bold; text-decoration: none;">tlt«</del></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> </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>devel<f|>ment of a ppfloiigation <fti <del style="font-weight: bold; text-decoration: none;">ili«</del></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> </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;">dorhal </del>sid*?, in c^^swjmfli'-*; of which' it</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> </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>, acjuir<;HS<>m«wliatof a jrfsur K)iaif<;. <del style="font-weight: bold; text-decoration: none;">Tti«</del></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> </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;">upiMfT tafj<;ring taiil is the '^uinji^j'yiu'mi</del></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> </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;">/>- ifr*«wj i-«it«ij. I'. nMitiU- 'A the rvcfiiUH f^vtihnli or nipiifihuiuH</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<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;">W' HTr.-J 'nlTJ;?''*- ■"■" ewiol^iuphati':ttif. Fig. ii}. Ii>^':. Jh'-.</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<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>jir-.'bcible by anal(.ig>' that the oloc>'>ftJc epitlicliuin givm 'M 'nzW^.,</div></td><td colspan="2" class="diff-side-added"></td></tr>
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<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>
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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. 4^2, of the head the otocysts are pear-shaped and</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. 4^2, of the head the otocysts are pear-shaped and</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;"><div>lympbatlcus: ok. upper:</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>lympbatlcus: ok. upper:</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>■hj,. lioriBHital <del style="font-weight: bold; text-decoration: none;">BpmF^lr</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>■hj,. lioriBHital <ins style="font-weight: bold; text-decoration: none;">Bpm </ins>utrioiiluB;.S(n-.t<«o</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>utrioiiluB;.S(n-.t<«o</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>lea. Aft*r W, 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>lea. Aft*r W, 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;"><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> </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>closely api resawl to the dorsal zones of His of the medulla oblongata. Therecessus^ebt 1 ill rapidly <ins style="font-weight: bold; text-decoration: none;">enlarges </ins>inditsupper end becomes dilated iij, 4 ( tofcrmtl esaccisendol\mphaticus,S.e, thenaiTower portion develops into the ductus endolj mphaticus of authors. The ductus subsequently becomes greatly elongated, and reaches through the whole pars petrosa, so that the saccus lies within the skull in the dura mater. Kiillifeer (in his "Entwickelungsgeschichte," pp. 744, 745) gives a fragmentary series of measurements of the recessua in mammalian embryos of various ages.</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>closely api resawl to the dorsal zones of His of the medulla oblongata. Therecessus^ebt 1 ill rapidly <del style="font-weight: bold; text-decoration: none;">eni ii^jes </del>inditsupper end becomes dilated iij, 4 ( tofcrmtl esaccisendol\mphaticus,S.e, thenaiTower portion develops into the ductus endolj mphaticus of authors. The ductus subsequently becomes greatly elongated, and reaches through the whole pars petrosa, so that the saccus lies within the skull in the dura mater. Kiillifeer (in his "Entwickelungsgeschichte," pp. 744, 745) gives a fragmentary series of measurements of the recessua in mammalian embryos of various ages.</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;"><div>3. The semicircular canals arise next from the walls of the primitive vestibule, and rapidly acquire great prominence, while the coclilea grows out slowly. Each canal first appears as a narrow fold, Fig. :)71, A..SC, P.fic, Ek.M; awide but thin evagination. In the middle of each evagination the opposite walls meet and coalesce, leaving only the rim of the originnl flat pouch; this rim is the permanent semicircular canal. N. Riidinger, 88.2, asserts that each semicircular canal arises from two buds, which elongate as blind tubes, and the tubes uniting fomi a complete canal. The later investigations of R. Krause, 00. 1, and W. His, Jr., 89.1, continnthe older, not Riidinger's view. The canals do not all develop synchronously; the upper vertical canal is first differentiated {R. Krause, 90. 1, 30(1), next the lower vertical c^inal, and last the outer or horizontal canal. W. His found in a human enibrj-o of five weeks that the three evaginations %vere present, but only the two vertical canals had become rings, Fig. 433. The further development of the canal consists in the gradual assumption of the adult form and size, the anipull;e appearing quite early. Fig. 4!.i. Thoembryonic connective tissue about the organ, as a whole, is gradually converted into cartilage and ultimat^y ossifies. The connectne tissue (mesoderm) immetiiately alwnt the otocyst has a diflferent historj which may be readily followe*! in connection with the study of the semicircular canals, and hence may be mentioned now. In Fig. 4^5, the epithelial semicircular canal, in, I, is seen surrounded by a cartilage, f , but sepjirated from it by (I thick layer of gelatinous tissue, (f, and the fibrous perichondrium (future periosteum) , /. Later, the layer, f/, is seiwrated into a thin subepithelial layer, which persists, and a main or gelatinous layer proper, which atrophies, thus leaving the</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>3. The semicircular canals arise next from the walls of the primitive vestibule, and rapidly acquire great prominence, while the coclilea grows out slowly. Each canal first appears as a narrow fold, Fig. :)71, A..SC, P.fic, Ek.M; awide but thin evagination. In the middle of each evagination the opposite walls meet and coalesce, leaving only the rim of the originnl flat pouch; this rim is the permanent semicircular canal. N. Riidinger, 88.2, asserts that each semicircular canal arises from two buds, which elongate as blind tubes, and the tubes uniting fomi a complete canal. The later investigations of R. Krause, 00. 1, and W. His, Jr., 89.1, continnthe older, not Riidinger's view. The canals do not all develop synchronously; the upper vertical canal is first differentiated {R. Krause, 90. 1, 30(1), next the lower vertical c^inal, and last the outer or horizontal canal. W. His found in a human enibrj-o of five weeks that the three evaginations %vere present, but only the two vertical canals had become rings, Fig. 433. The further development of the canal consists in the gradual assumption of the adult form and size, the anipull;e appearing quite early. Fig. 4!.i. Thoembryonic connective tissue about the organ, as a whole, is gradually converted into cartilage and ultimat^y ossifies. The connectne tissue (mesoderm) immetiiately alwnt the otocyst has a diflferent historj which may be readily followe*! in connection with the study of the semicircular canals, and hence may be mentioned now. In Fig. 4^5, the epithelial semicircular canal, in, I, is seen surrounded by a cartilage, f , but sepjirated from it by (I thick layer of gelatinous tissue, (f, and the fibrous perichondrium (future periosteum) , /. Later, the layer, f/, is seiwrated into a thin subepithelial layer, which persists, and a main or gelatinous layer proper, which atrophies, thus leaving the</div></td></tr>
</table>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182417&oldid=prevZ8600021: /* Chapter XXVIII. The Sense-Organs */2015-06-17T22:58:07Z<p><span dir="auto"><span class="autocomment">Chapter XXVIII. The Sense-Organs</span></span></p>
<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182417&oldid=182415">Show changes</a>Z8600021https://embryology.med.unsw.edu.au/embryology/index.php?title=1897_Human_Embryology_28&diff=182415&oldid=prevZ8600021 at 22:38, 17 June 20152015-06-17T22:38:42Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 09:38, 18 June 2015</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;"><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>Ganglionic Sense-<del style="font-weight: bold; text-decoration: none;">Oi^ans</del>.* — By this term I propose to designate the series of organs formed by the temporary or permanent union of ihi) sensory ganglia, described in the previous chapter, with the epidermis. The discovery that such a class of organs exists, and that the ear ])robably, the eye and nose possibly, Mong to the class, was due to Froriep, 85. 1, whose article marks an important step in vertebrate morpholog}'. The temporary coimection of certain ganglia with the epidermis was, so far as I know, first discovered by J. W. Van Wijlie, 82. 1, in elasmobranch embryos, and has been esj)ecialh' studied by Beard, 85.1, whose researches have proved valuable and suggestive, though his publications are marred by premature and too diagrammatic generaliziitions. Beard proposes the name of branchial sense-ofyaiis, but the term most generall}' useil is segmental sfuse-orrfans, because the organs are believed to be repeateil in each segment. The term adopted here, '* ganglionic," is purely descriptive, and involves no theory as do the two others just mentioned, and moreover serves to indicate also the distinction between the two main classes of sense-organs.</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>Ganglionic Sense-<ins style="font-weight: bold; text-decoration: none;">Organs</ins>.* — By this term I propose to designate the series of organs formed by the temporary or permanent union of ihi) sensory ganglia, described in the previous chapter, with the epidermis. The discovery that such a class of organs exists, and that the ear ])robably, the eye and nose possibly, Mong to the class, was due to Froriep, 85. 1, whose article marks an important step in vertebrate morpholog}'. The temporary coimection of certain ganglia with the epidermis was, so far as I know, first discovered by J. W. Van Wijlie, 82. 1, in elasmobranch embryos, and has been esj)ecialh' studied by Beard, 85.1, whose researches have proved valuable and suggestive, though his publications are marred by premature and too diagrammatic generaliziitions. Beard proposes the name of branchial sense-ofyaiis, but the term most generall}' useil is segmental sfuse-orrfans, because the organs are believed to be repeateil in each segment. The term adopted here, '* ganglionic," is purely descriptive, and involves no theory as do the two others just mentioned, and moreover serves to indicate also the distinction between the two main classes of sense-organs.</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>As an example of a typical ganglionic sense-organ of an embryo we may take the front ganglion of a young elasmobranch. This ganglion belongs to the third cranial or (X*ulo-motor nerve. According to Tk^ard it grows out from the neural crest of the mid-brain shortly bef<ire the closure of the medullary groove at that point. It soon comes in contact with the epidermis, which thickens where 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>As an example of a typical ganglionic sense-organ of an embryo we may take the front ganglion of a young elasmobranch. This ganglion belongs to the third cranial or (X*ulo-motor nerve. According to Tk^ard it grows out from the neural crest of the mid-brain shortly bef<ire the closure of the medullary groove at that point. It soon comes in contact with the epidermis, which thickens where the <ins style="font-weight: bold; text-decoration: none;">ganglion touches it. the thickened epidBrmiu and tho gmiglion tiiuii</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;"><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><del style="font-weight: bold; text-decoration: none;">A<lditionjil </del>ih'tails aiv givcu iu counectioD with the history of the cephalic nerves in the <del style="font-weight: bold; text-decoration: none;">prtH</del>.<del style="font-weight: bold; text-decoration: none;">*edin^ cliapter</del>, p. 033.</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;">Additionjil </ins>ih'tails aiv givcu iu counectioD with the history of the cephalic nerves in the <ins style="font-weight: bold; text-decoration: none;">first edn</ins>. <ins style="font-weight: bold; text-decoration: none;">chapter</ins>, p. 033.</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><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" 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;">ganglion touches it. the thickened epidBrmiu und tho gmiglion tiiuii</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;"><div>futte. Fig. 4(lti, the former hecominK uepreH8ed ho hh to mulco a hIihI</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>futte. Fig. 4(lti, the former hecominK uepreH8ed ho hh to mulco a hIihI</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>low pit. The boundary Itetweeii the two tifHiieH tieconic'H iiidiHtiiK^.</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>low pit. The boundary Itetweeii the two tifHiieH tieconic'H iiidiHtiiK^.</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>According to Beard some of the cells are <del style="font-weight: bold; text-decoration: none;">Hpe</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>According to Beard some of the cells are <ins style="font-weight: bold; text-decoration: none;">specialized </ins>later to form what he terms the BUjini</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;">cialized </del>later to form what he terms the BUjini</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>brancbiul nerve, and of this his figum, Fig, 40(1, indicates the commencement, tip.n. tijiniilar fusions have been demonstrated in the amniota by Froriep in the ca»o of the ganglia of the facial, glosso-pharyngeal, and vagus nervtm; the site of the fusion is for each of these ganglia directly alwve the gill-(rleft to which tho nerve of the ganglion bel<>ngs. The term brancliiul sense-organ has referenceto this position, which is assumed by Beard to be typical for all <ins style="font-weight: bold; text-decoration: none;">the </ins>organs of the class.</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>brancbiul nerve, and of this his figum, Fig, 40(1,</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> </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>indicates the commencement, tip.n. tijiniilar</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> </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>fusions have been demonstrated in the amniota</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> </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>by Froriep in the ca»o of the ganglia of the</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> </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>facial, glosso-pharyngeal, and vagus nervtm;</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> </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>the site of the fusion is for each of these ganglia</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> </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>directly alwve the gill-(rleft to which tho nerve</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> </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>of the ganglion bel<>ngs. The term brancliiul</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> </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>sense-organ has referenceto this position, which</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> </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>is assumed by Beard to be typical for all <del style="font-weight: bold; text-decoration: none;">tliu</del></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> </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>organs of the class.</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;"><div>0. JCupffer, 91.1, has Hhown that in I'etromyzon the ganglia frjrm two series of unionti with tho epidermis, and maintains that at <!furh , point of union cells are Iniddeiloff from the epidermis and incorporated in the ganglion which is so enlarged. Fig, 41)7 illustrat<M the ar- aiaPA!"'Mv-'r S' rangement of the ganglia as found by him in a young Petromyzon ( Amm'xxetes of 4 mm.). thefivegniatganKlin of the head (the cnliarj-, 1.; trigt^minul, II.; w.-(mstiu>-ff»;ial. 111. ; gloaso-pharjTigeal, IV. ; and vn(fii«, V.j are each iiiuutn^Hl with the epidermis and receive cells from it; the line of the ganglia is pr*ilonged backward by tho lateral line; if the line of l\ii- ganglia were continued forward it would, allowing f'lr tin- l»end of the Ixwl, UfTminate in the nasal pit, -V, or anlage of tin; olfa<ft'iry organ ; the <Mr (otocyst) lies directb' along tho line of the gjingUa, and r<;proHeiitM,</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>0. JCupffer, 91.1, has Hhown that in I'etromyzon the ganglia frjrm two series of unionti with tho epidermis, and maintains that at <!furh , point of union cells are Iniddeiloff from the epidermis and incorporated in the ganglion which is so enlarged. Fig, 41)7 illustrat<M the ar- aiaPA!"'Mv-'r S' rangement of the ganglia as found by him in a young Petromyzon ( Amm'xxetes of 4 mm.). thefivegniatganKlin of the head (the cnliarj-, 1.; trigt^minul, II.; w.-(mstiu>-ff»;ial. 111. ; gloaso-pharjTigeal, IV. ; and vn(fii«, V.j are each iiiuutn^Hl with the epidermis and receive cells from it; the line of the ganglia is pr*ilonged backward by tho lateral line; if the line of l\ii- ganglia were continued forward it would, allowing f'lr tin- l»end of the Ixwl, UfTminate in the nasal pit, -V, or anlage of tin; olfa<ft'iry organ ; the <Mr (otocyst) lies directb' along tho line of the gjingUa, and r<;proHeiitM,</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l49">Line 49:</td>
<td colspan="2" class="diff-lineno">Line 26:</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>■iilin-tnnrhlal nmw ■»Irnif, luiiuinlljut Ui Hranl: f/i. KaiiK»"i<, TriKtilr iiuff<del style="font-weight: bold; text-decoration: none;">' — ■ -"-rJ-Jm 1<MV<].</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>■iilin-tnnrhlal nmw ■»Irnif, luiiuinlljut Ui Hranl: f/i. KaiiK»"i<, TriKtilr iiuff</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"></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 Cvptwlln fiwurllA "I • V'^i'iaijiim Lvtb. < m</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 Cvptwlln fiwurllA "I • V'^i'iaijiim Lvtb. < m</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>. J-V. (inbaJic omIU; <del style="font-weight: bold; text-decoration: none;">/- >r*'X'r'- II- l"r*></del>nff. .v. umI [it<</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>. J-V. (inbaJic omIU; nff. .v. umI [it<</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>ir h>-p'j[i)i)'>iii mud B^nsAt: II. unjutb tatuj: t. 4. <del style="font-weight: bold; text-decoration: none;">',. 7. K. •ythnaiaal </del>(au <del style="font-weight: bold; text-decoration: none;">•i»-l- O*. «'»,-yH; *■■„ ICt. (-Ill tr^r:l*%. trnaXlj tumliT^: ikA, u^'/ii/it1.</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>ir h>-p'j[i)i)'>iii mud B^nsAt: II. unjutb tatuj: t. 4.<ins style="font-weight: bold; text-decoration: none;">ythnaiaal </ins>(au </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>a.<del style="font-weight: bold; text-decoration: none;">"- </del>hatf l/een long known, an epidermal area in r.-onta/.-t with tli« acoustic ganglion: tbe olfactory* area, an vi'i b<ive seffTi, \>. ''/A"!, aW) throws off celbs and produces a ganglion, whi^rh we may, hy[x/thet> ically at leaiit. add to the ckaio of ganglia I.-V. We hitve tt*>^i iIk;</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. hatf l/een long known, an epidermal area in r.-onta/.-t with tli« acoustic ganglion: tbe olfactory* area, an vi'i b<ive seffTi, \>. ''/A"!, aW) throws off celbs and produces a ganglion, whi^rh we may, hy[x/thet> ically at leaiit. add to the ckaio of ganglia I.-V. We hitve tt*>^i iIk;</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 colspan="2" class="diff-lineno" id="mw-diff-left-l76">Line 76:</td>
<td colspan="2" class="diff-lineno">Line 53:</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>Evolution of the Ganglionic Sense-Organs. — Lenhossek, 92,1, has shown that in the earth- woi-m there are cells scattered through the epidermis which give off fibres which run to the central nervous system, and there like vertebrate sensorj^ fibres fork ; one fork runs hemiward, the other tailward within the central ganglionic chain. This important discovery renders it probable that sensory ganglion cells and sensory cells were originally one, and that the ganglion cells of vertebrates are nerve-sense ceDs, which have migrated from the epidermis. The ganglionic senseorgans in this way are traced to a genetic condition arrested, for we may assume that they correspond to areas in which the nerve-sense cells are congregated, and that part of the cells remain in the epidermis, while others migrate from it to constitute the ganglion. Lenhossek's discover^' leads him to the further hypothesis that the si)ecial sense-cells connected with a nerve-fibre, such as occur in taste-bulbs, the olfactory membrane, and the organ of Corti, are really comparable to the nerve-sense cells of Lumbricus, and are true neuroblasts in that they produce the nerve-fibres connected with them; hitherto we have assumed that the nerve-fibre grew to the cell. It seems to me that Lenhossek's hypothesis is likely to be verified with revolutionary results for our conceptions of the morphology of the nervous system and sense-organs.</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>Evolution of the Ganglionic Sense-Organs. — Lenhossek, 92,1, has shown that in the earth- woi-m there are cells scattered through the epidermis which give off fibres which run to the central nervous system, and there like vertebrate sensorj^ fibres fork ; one fork runs hemiward, the other tailward within the central ganglionic chain. This important discovery renders it probable that sensory ganglion cells and sensory cells were originally one, and that the ganglion cells of vertebrates are nerve-sense ceDs, which have migrated from the epidermis. The ganglionic senseorgans in this way are traced to a genetic condition arrested, for we may assume that they correspond to areas in which the nerve-sense cells are congregated, and that part of the cells remain in the epidermis, while others migrate from it to constitute the ganglion. Lenhossek's discover^' leads him to the further hypothesis that the si)ecial sense-cells connected with a nerve-fibre, such as occur in taste-bulbs, the olfactory membrane, and the organ of Corti, are really comparable to the nerve-sense cells of Lumbricus, and are true neuroblasts in that they produce the nerve-fibres connected with them; hitherto we have assumed that the nerve-fibre grew to the cell. It seems to me that Lenhossek's hypothesis is likely to be verified with revolutionary results for our conceptions of the morphology of the nervous system and sense-organs.</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 Special Sense-Cells. — I wish to point out that there is a remarkable uniformity in the specialization of the sense-cells in the organs of taste, smell, sight, and hearing, which at once suggests that they are all derived from a common form. The cells are elongated and have, 1, a lower tapering infra-nuclear member, which is a portion of the protoplasmatic body of the cell, and is, probably, always connected with a nerv'e-fibril ; 2, an upper supra-nuclear member, which is also part of the protoplasmatic cell ])ody and stretches to the surface of the epithelial layer in which the 8|)ecial sense-colls are situated ; 3, a projection above the surface of the epithelium ; the projection is different in character from the protoplasm ; it differs also according to the organ ; the projection is called a hair or cilium in the case of the organs of taste, smell, and hearing, a rod or cone in the case 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 Special Sense-Cells. — I wish to point out that there is a remarkable uniformity in the specialization of the sense-cells in the organs of taste, smell, sight, and hearing, which at once suggests that they are all derived from a common form. The cells are elongated and have, 1, a lower tapering infra-nuclear member, which is a portion of the protoplasmatic body of the cell, and is, probably, always connected with a nerv'e-fibril ; 2, an upper supra-nuclear member, which is also part of the protoplasmatic cell ])ody and stretches to the surface of the epithelial layer in which the 8|)ecial sense-colls are situated ; 3, a projection above the surface of the epithelium ; the projection is different in character from the protoplasm ; it differs also according to the organ ; the projection is called a hair or cilium in the case of the organs of taste, smell, and hearing, a rod or cone in the case of the eye.</div></td></tr>
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