File:Cullen1916 fig06.jpg
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Fig. 6. Anterior View and Transverse Section of a Human Embryo 7 mm Long
Showing the Umbilical Region.
The umbilical cord has been cut off near the embryo in order to show the thick lower portion containing the umbilical vessels and allantois. The upper portion consists mainly of the exoccelomic cavity, which contains the intestinal loop and the omphalomesenteric vessels. The omphalomesenteric duct has been drawn to the right, in order that it may be more clearly seen. Note the narrow ccelomic ring through which the intestine and vessels emerge. At the outer end of the intestinal loop the omphalomesenteric duct begins.
The lower diagram represents a transverse section of the body at the level indicated in the upper picture. The purpose of this diagram is to show the shifting of the left umbilical vein toward the mid-line of the body, as a result of the ventral growth of the body-wall. The right umbilical vein is destined to disappear.
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, May 19) Embryology Cullen1916 fig06.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Cullen1916_fig06.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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