File:Umbilical Region in a Human Embryo 7.5 cm. long.jpg

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Description Fig. 17. — Intra-abdominal View of the Umbilical Region in a Human Embryo 7.5 cm. Long. (X6.) In this case the allantois (urachus) is very narrow, as seen in the cross-section of the abdominal wall, as well as in the cross-section of the cord. The tissues containing the umbilical arteries and urachus are attached to the abdominal wall by a well-defined but narrow mesentery. This, however, is exceptional. At the umbilicus the coelomic ring is obliterated and appears as a crescent between the umbilical arteries and vein. Farther out in the cord, however the exocoelom can still be clearly seen as a small, star-shaped cavity. The cord is markedly twisted.
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Source https://archive.org/details/embryologyanatom00cull/page/18/mode/2up Embryology, anatomy, and diseases of the umbilicus : together with diseases of the urachus
Author Cullen, Thomas Stephen, 1868-1953

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current02:30, 18 February 2024Thumbnail for version as of 02:30, 18 February 2024777 × 691 (432 KB)Rasbak (talk | contribs){{Information |description=Fig. 17. — Intra-abdominal View of the Umbilical Region in a Human Embryo 7.5 cm. Long. (X6.) In this case the allantois (urachus) is very narrow, as seen in the cross-section of the abdominal wall, as well as in the cross-section of the cord. The tissues containing the umbilical arteries and urachus are attached to the abdominal wall by a well-defined but narrow mesentery. This, however, is exceptional. At the umbilicus the coelomic ring is obliterated and appears...

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