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Fig. 194. Ventral reconstruction of the veins of the liver in a 4.9 mm human embryo
(Ingalls).
Soon, the proximal part of the left vitelline vein is largely absorbed into the hepatic sinusoids and shifts its blood flow to the right horn of the sinus venosus. Moreover, in 5 mm. embryos, the parallel vitelline veins communicate by three cross anastomoses (Figs. 194 and 195): (1) a cranial transverse connection in the liver, ventral to the duodenum; (2) a middle one, dorsal to the duodenum; and (3) a caudal one, ventral to it. There are thus formed about the gut a cranial and a caudal venous ring. A new vessel, the superior mesenteric, now develops in the mesentery of the intestinal loop and joins the left vitelline vein just caudal to its middle anastomosis (Fig. 195).
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Reference
Arey LB. Developmental Anatomy. (1924) W.B. Saunders Company, Philadelphia.
Cite this page: Hill, M.A. (2024, May 21) Embryology Arey1924 fig194.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Arey1924_fig194.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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