File:Evans1909 fig09-12.jpg

From Embryology

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Figs. 9-12.Chick Embryo 23, 24, 30, 35 Somites

Fig. 9. Injected chick embryo of 23 somites to show the origin of the umbilical vein from a capillary plexus situated in the angle between the posterior cardinal vein and the duct of Cuvier. A. C. V. = anterior cardinal vein; P. C. V. = posterlor cardinal vein; U = capiliaries destined to form the umbilical vein.

Fig. 10. Injected chick embryo of 24 somites to show the extension in the somatopleure, of capillary plexus forming the umbilical vein. The lettering is the same as fig. 9.

Fig. 11. Injected chick embryo of 30 somites. The capillaries destined to form the umbilical vein have reached the region of the future arm bud where they are joined by a direct capillary sprout from the aorta (subclavian artery).

Fig. 12. Injected chick embryo of 35 somites, showing establishment of umbilical vein as the main drainage channel of the anterior limb.

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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)

Evans (1909) Figures: 1 Chick 17 somites | 2 Chick 20 somites | 3 Chick 23 somites | 6 Chick lateral 25 somites |


Evans HM. On the development of the aortae, cardinal and umbilical veins, and the other blood vessels of vertebrate embryos from capillaries. (1909) Anat. Rec. 3: 498-518.

Cite this page: Hill, M.A. (2024, June 22) Embryology Evans1909 fig09-12.jpg. Retrieved from

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