File:Umbilical Region in a Human Embryo 10 cm. in length.jpg

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Description Fig. 19. — Intra-abdominal View ofjhe Umbilical Region in a Human Embryo 10 cm. in Length. (X 6.) The urachus is very narrow, but is continued out into the cord (allantois). In this cross-section of the cord it was recognized as a nest of polygonal cells devoid of a lumen, and surrounded by several bundles of well-defined non-striped muscle. This muscle surrounded the urachus down to, and merged into, that of the bladder. The umbilical ring is completely sealed over by a broad connective-tissue band. In the cross-section of the cord no remnants of the exoccelomic cavity were demonstrable, but in its place were traces of blood-vessels, evidently remains of the omphalomesenteric vessels.
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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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current02:37, 18 February 2024Thumbnail for version as of 02:37, 18 February 2024971 × 826 (652 KB)Rasbak (talk | contribs){{Information |description=Fig. 19. — Intra-abdominal View ofjhe Umbilical Region in a Human Embryo 10 cm. in Length. (X 6.) The urachus is very narrow, but is continued out into the cord (allantois). In this cross-section of the cord it was recognized as a nest of polygonal cells devoid of a lumen, and surrounded by several bundles of well-defined non-striped muscle. This muscle surrounded the urachus down to, and merged into, that of the bladder. The umbilical ring is completely sealed over...

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