File:Blyakher1955 fig03.jpg

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Fig. 3. Table of drawings from K. F. Wolff's dissertation illustrating the development of the chicken

Caspar Wolff

1 . The embryonic spot (n) from the non-incubated egg in its natural size? b, c - circular position of the globules around the "center of conception" of the embryo (a) ; d- granules of yolk.

2. The embryonic spot after 28 hours of incubation in its natural size.

3. The same, under magnification? a - yolk membrane; b - embryo, included in saccule of water membrane.

4. The same, under somewhat less magnification; saccule (c) on the embryo extends and the last shines (e) ; a and b in correct rings and islets around the embryo; s - stretched membrane in fold.

5. The embryo at 36 hours; in the head "something of a beak," parts of brain and eyes with optic nerves; h - the spinal cord; d, e, f, g - vertebrae; c - substance surrounding the spinal cord; b- cavity of embryo membrane; k - heart.

6 . Part of the vertebrae of the embryo represented in Figure 5, under greater magnification.

7. The embryonic spot in the ovum after 64 hours of incubation, in its natural size; v - yolk; d, f - islets: a - umbilical disc; b - rudiments of the vessels; n - mobile particle ("membrane" of Malpighi) ; e - embryo.

8. Region of embryonic spot of the previous embryo, in greater magnification; a - island of "white matter"; e, b - red fluid; d - boundary of the islet, as in Figure 7.

9. Part of the spinal column (a) and heart (c) of embryo of

64 hours; b - substance surrounding the vertebrae; d - cavity of the heart with blood globules .

10. Part of umbilical area after 72 hours of incubation; magnification larger than Figures 7 and 8; e, fc> - ducts, forming the vessels; m - boundary of the yolk.

11. Embryo after 96 hours of incubation; the vertebrae are visible (g) ; rudiments of extremities (r) and heart (c) .

12. Half of vertebra of embryo of 34 hours; c - substance surrounding the column; r - rudiment of the extremity.

13. Posterior part of the vertebra of the embryo of the fifth day; g - vertebra; r - extremity; b - condensation of substance, giving the origin of the rectum between extremities and the tail, and also kidney (d) ; e - remnants of urinary sac and membrane of the umbilical vessels .

14. Spirit preparation of chicken embryo, slightly magnified; - occiput; S - forehead; r - beak; v - vertebra; e - extremities; a - abdomen.

15 . Pelvis and lower part of the abdomen of the embryo represented in Figure 14; covers of the abdomen; b - red fluid, the same as under letter b in Figure 13; d - place of removed rectum; f - place where intestine passes in the still unformed substance e; c - substance giving the origin of the ureter.

16. Kidneys (b) and rectum (e) with caecum of embryo somewhat later than in Figure 14; c - ureters; d - the lower part of the rectum.

17. Nearly formed kidneys (b) ; c - ureters; d - rectum.


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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

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 13) Embryology Blyakher1955 fig03.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Blyakher1955_fig03.jpg

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current21:59, 10 May 2018Thumbnail for version as of 21:59, 10 May 20181,028 × 1,253 (219 KB)Z8600021 (talk | contribs)
21:59, 10 May 2018Thumbnail for version as of 21:59, 10 May 20182,269 × 3,129 (572 KB)Z8600021 (talk | contribs)Figure 3. Table of drawings from K. F. Wolff's dissertation illustrating the development of the chicken.