File:Cullen1916 fig10.jpg

Fig. 10. Anterior View of the Umbilical Cord of a Human Embryo 18 mm in Length

A portion of the cord has been removed, as shown by the dotted line.

The exoccelomic cavity has increased materially in size and contains several loops of intestine, including the cecum and budding appendix, seen on the extreme left (right in picture). The narrow ccelomic ring is obscured by the intestine. The omphalomesenteric duct has disappeared, and we now have only the omphalomesenteric vessels passing out into the exoccelom. This more rapid disappearance of the delicate epithelial structure of the vitelline duct, as contrasted with the preservation of the stronger tissues of the blood-vessels, is probably caused by the continued tension to which the yolk-stalk is subjected. (See Figs. 11 and 12 ) The exocoelomic cavity rapidly tapers to a narrow chink, as seen in the upper and more distal section. In the mid-line of the cord below are the two umbilical arteries, with the allantois between and slightly below them. The umbilical vein lies to the left.

The characteristic twist of the cord, including all of its structures, is clearly seen.

Historic Disclaimer - information about historic embryology pages

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)

Figure Links: 1 Human embryo 0.7 mm | 2 Human embryo 1.7 mm | 3 Human embryo 2.5 mm | 4 Human embryo 3.5 mm | 5 Human embryo 5 mm | 6 Human embryo 7 mm | 7 Human embryo 7 mm | 8 Human embryo 10 mm | 9 Human embryo 12.5 mm | 10 Human embryo 10 mm | 11 Human embryo 23 mm | 12 Human embryo 3 cm | 13 Human embryo 4.5 cm sagittal | 14 Human Embryo 4.5 cm | 15 Human Embryo 5.2 cm | 16 Human Embryo 6.5 cm | 17 Human Embryo 7.5 cm | 18 Human Embryo 9 cm | 19 Human Embryo 10 cm | 20 Human Embryo 12 cm | 21 Human Embryo 12 cm | 22 Human Embryo 12 cm | 23 Human Embryo 12 cm Cord | 28 Fetus Five Months | 30 Ventral Heria | 31 Human Embryo 5.5 cm | 32 Term Human | 33 Term Human | [[Figures

Reference

Cullen TS. Embryology, anatomy, and diseases of the umbilicus together with diseases of the urachus. (1916) W. B. Saunders Company, Philadelphia And London.

Cite this page: Hill, M.A. (2024, April 23) Embryology Cullen1916 fig10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Cullen1916_fig10.jpg

What Links Here?

© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G