File:Blyakher1955 fig07.jpg

Fig. 7. Table II illustration from Wolff's "On the Formation of the Intestine"

1. Embryo of 4 days incubation; r - excised part of the vascular area on which the vesicle lies; a, b, c - vesicle or false amnion; g, h, i, 1- - translucent embryo; h - occiput;

g - anterior part of the head; i - vertebra; 1 - left wing; k - left auricle; B - left lateral part of thorax; C - fold of abdominal opening and true amnion (Table I , Fig. 2, ii, Fig. 7, xx) ; e - intestinal fold and fold of false amnion (see Table I, Fig. 7, n) ; m - opening between true and false amnion; d - part of middle intestine; f - rounded fossa, appearing from cardiac fossa, groove and lower fossa; N - lower fossa; p - right yolk vein; o - artery of that side; n - left yolk artery; q- -umbilical vesicle (allantois) .

2. The same object with extracted false amnion; a - part of upper layer of vascular area; b- -true amnion; c - occiput; d - anterior part of the head; D- middle protuberance, disappearing after six days; e- -vertebra; f - left wing;

F - left leg; g - left auricle; h- - lateral part of thorax; i - folds of abdominal opening from which membrane of true amnion takes origin; H, H- -the area of the abdomen, adjacent to the thighs, forming paired cavities in the sides of the vertebrae; E- - backwards-bending part of this cavity; k, 1, m, n, o, p- parts beginning from abdominal cavity; k - intestinal fold from which the membrane of the false amnion continues (n) ; 1 - deeper fold of intestine; m - parts of folded middle intestine; n - part of false amnion; o - its part continuing through the cardiac fossa to the stomach; p- upper part of the rectum.

3. The same object; amnion destroyed, lateral parts of thorax removed; and also abdominal cavity, extremities and head; viscera is visible; a - left chamber of heart; b - aural canal; c - left auricle; d - arch of aorta; v- - venous sinus; f - left lobe of liver; g - rudiment of abdomen; h - digestive tract; i - stomach; k - intestinal fold; 1 - duodenum; MM - middle intestine; n - part of membrane of false amnion; o - part of this membrane covering the intestinal canal; p- upper funnel-shaped part of the rectum; q - lower part of rectum, which, like the stomach, also already has cylindrical form, while lying between them a part of intestine opened; r - mesentery - continuation of false amnion and intestinal membranes; s - left kidney; t - part of vertebrae; u - left yolk artery.

4. The same preparation from the right side; a- - left chamber of the heart; b - its right chamber; c - aorta; d - arch of aorta; e - rudiment of left lung; f - right lobe of liver;

g - right kidney; h - right yolk artery; i - right intestinal membrane, from which middle intestine is formed; k - rectum; 1- mesentery; m - right membrane of false amnion; n - right yolk vein; N - trunk of vein; o - vertebrae.

5. Embryo represented in Table 1, Fig. 6, liberated from all membrane; a - anterior part of the head; b- - occiput; c, d - occipital region; d, e - region of thorax; e-z- the rest of the vertebrae; g - left part of the lower jaw; f - -process (first rib) ; h - left auricle; i - aural canal; k - left chamber of heart; 1 - aorta; m - membrane represented in Fig. 3, g; n - part of false amnion from which the cardiac fossa and stomach are formed; o, p, q, s, t, z - first rudiment of abdomen in the form of bending membrane; o - upper part of this membrane; p, s- edge of abdominal fold; q - its upper left, strongly curved part; t - its edge in the place where it becomes wider; v - right lateral abdominal membrane; u - left membrane; s, r, z - intestinal canal (fistula intestinalis) - first rudiment of mesentery with still divided membranes; s - right mesenterical membrane with right kidney; r - the same also - left; w- - opening between membranes of mesentery, in which uncovered vertebra is seen; x - vertebrae; y - rudiment of tailbone; z - rudiment of the pelvis .

6 . Embryo represented in Table I , Fig . 7 ; a - anterior part of the head; b - posterior part of the head; c - protuberance (see Fig. 2, D) ; d - thoracic part of the vertebrae; e - occipital region; f - rudiments of ribs; g - rudiment of wing; h - rudiment of leg; i - hip region; k - region of tailbone; 1 - rudiment of pelvic cavity; m - rudiment of true amnion; n - part of thorax; o - left auricle; q- - middle chamber; r a bdomen ; s - stomach; t - ascending vein; u - part of cephalic branch; v - edge of the stomach (see Table I, Fig. 1 , k) -, w - intestinal fold; x - part of false amnion; y - completely formed mesentery; z - upper, funnel-shaped part of the rectum; A - left, kidney, later on separated from the mesentery; B - yolk artery.

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Figures: 1 Arnold van der Hulst | 2 Kaspar Friedrich Wolff | Wolff's chicken development

Reference

Blyakher L. History of embryology in Russia from the middle of the eighteenth to the middle of the nineteenth century (istoryia embriologii v Rossii s serediny XVIII do serediny XIX veka) (1955) Academy of Sciences USSR. Institute of the History of Science and Technology. Translation Smithsonian Institution (1982).

Cite this page: Hill, M.A. (2024, April 20) Embryology Blyakher1955 fig07.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Blyakher1955_fig07.jpg

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