File:Mall1912-fig02.jpg - Revision history

Z8600021 at 06:52, 31 July 2017

2017-07-31T06:52:29Z

← Older revision		Revision as of 17:52, 31 July 2017
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	==Fig. 2. From the reconstruction of a heart of an embryo 3.5 mm long==		==Fig. 2. From the reconstruction of a heart of an embryo 3.5 mm long==

	Embryo (No. ~~164~~). X 66. View from the left side.		Embryo (No. {{CE164}}). X 66. View from the left side.

	In the embryo 3.5 mm. long (No. 164) the completed heart tube is seen, which is S-shaped and twisted upon itself so that the arterial and venous ends are brought close together. At the venous end the muscle wall is slightly dilated which marks the atrium; this is lined closely with endothelium which encircles the cavity within. No delicate fibrils are here seen between the muscle wall and its endothelial lining. Then follows an upper bend to the heart after which there is a dilatation projecting towards the left side, the former marking the atrial: canal and the latter the left ventricle. The lower connecting piece unites the left ventricle with the bulb which later on gives rise to the right ventricle. In the atrial canal (Haller’s auricular canal) the endothclial tube is seen as a solid strand of cells suspended freely in the muscle wall by the delicate fibrils already mentioned. In the left ventricle the tube shows a distinct cavity, while throughout the rest of the heart tube the cavity is irregular but not pronounced. The form of the endothelial tube is shown in fig. 2 and again in a semi-diagrammatic figure of a transverse section through the atrium, ventricle and bulb in [[:File:Mall1912-fig03.jpg\|fig. 3]]. The delicate fibrils, which no doubt belong to the endothelial cells are present in large number throughout the whole heart tube, excepting in that which forms the atrium. In another embryo (No. 384, 2 mm. long), considerably smaller than the one just described and probably pathological, the degree of development of the heart is practically identical with the one 3.5 mm. long (No. 164).		In the embryo 3.5 mm. long (No. 164) the completed heart tube is seen, which is S-shaped and twisted upon itself so that the arterial and venous ends are brought close together. At the venous end the muscle wall is slightly dilated which marks the atrium; this is lined closely with endothelium which encircles the cavity within. No delicate fibrils are here seen between the muscle wall and its endothelial lining. Then follows an upper bend to the heart after which there is a dilatation projecting towards the left side, the former marking the atrial: canal and the latter the left ventricle. The lower connecting piece unites the left ventricle with the bulb which later on gives rise to the right ventricle. In the atrial canal (Haller’s auricular canal) the endothclial tube is seen as a solid strand of cells suspended freely in the muscle wall by the delicate fibrils already mentioned. In the left ventricle the tube shows a distinct cavity, while throughout the rest of the heart tube the cavity is irregular but not pronounced. The form of the endothelial tube is shown in fig. 2 and again in a semi-diagrammatic figure of a transverse section through the atrium, ventricle and bulb in [[:File:Mall1912-fig03.jpg\|fig. 3]]. The delicate fibrils, which no doubt belong to the endothelial cells are present in large number throughout the whole heart tube, excepting in that which forms the atrium. In another embryo (No. 384, 2 mm. long), considerably smaller than the one just described and probably pathological, the degree of development of the heart is practically identical with the one 3.5 mm. long (No. 164).

Z8600021: /* Fig. 2. From the reconstruction of a heart of an embryo 3.5 mm long */

2015-10-31T00:53:50Z

Fig. 2. From the reconstruction of a heart of an embryo 3.5 mm long

← Older revision		Revision as of 11:53, 31 October 2015
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	{{Mall1912 figures}}		{{Mall1912 figures}}

			[[Category:Carnegie Embryo 164]]

Z8600021 at 00:53, 31 October 2015

2015-10-31T00:53:05Z

← Older revision		Revision as of 11:53, 31 October 2015
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	Embryo (No. 164). X 66. View from the left side.		Embryo (No. 164). X 66. View from the left side.

			In the embryo 3.5 mm. long (No. 164) the completed heart tube is seen, which is S-shaped and twisted upon itself so that the arterial and venous ends are brought close together. At the venous end the muscle wall is slightly dilated which marks the atrium; this is lined closely with endothelium which encircles the cavity within. No delicate fibrils are here seen between the muscle wall and its endothelial lining. Then follows an upper bend to the heart after which there is a dilatation projecting towards the left side, the former marking the atrial: canal and the latter the left ventricle. The lower connecting piece unites the left ventricle with the bulb which later on gives rise to the right ventricle. In the atrial canal (Haller’s auricular canal) the endothclial tube is seen as a solid strand of cells suspended freely in the muscle wall by the delicate fibrils already mentioned. In the left ventricle the tube shows a distinct cavity, while throughout the rest of the heart tube the cavity is irregular but not pronounced. The form of the endothelial tube is shown in fig. 2 and again in a semi-diagrammatic figure of a transverse section through the atrium, ventricle and bulb in [[:File:Mall1912-fig03.jpg\|fig. 3]]. The delicate fibrils, which no doubt belong to the endothelial cells are present in large number throughout the whole heart tube, excepting in that which forms the atrium. In another embryo (No. 384, 2 mm. long), considerably smaller than the one just described and probably pathological, the degree of development of the heart is practically identical with the one 3.5 mm. long (No. 164).


	{{Mall1912 figures}}		{{Mall1912 figures}}

Z8600021 at 15:03, 8 September 2015

2015-09-08T15:03:27Z

← Older revision		Revision as of 02:03, 9 September 2015
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	Embryo (No. 164). X 66. View from the left side.		Embryo (No. 164). X 66. View from the left side.


	{{Mall1912 figures}}		{{Mall1912 figures}}

Z8600021: Z8600021 uploaded a new version of File:Mall1912-fig02.jpg

2015-09-08T14:36:30Z

Z8600021 uploaded a new version of File:Mall1912-fig02.jpg

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Revision as of 01:36, 9 September 2015

Z8600021 at 14:33, 8 September 2015

2015-09-08T14:33:57Z

← Older revision		Revision as of 01:33, 9 September 2015
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			==Fig. 2. From the reconstruction of a heart of an embryo 3.5 mm long==

			Embryo (No. 164). X 66. View from the left side.


	{{Mall1912 figures}}		{{Mall1912 figures}}

Z8600021: {{Mall1912 figures}}

2015-09-08T14:31:45Z

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