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From Embryology

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Human Sinus Venosus and its Tributaries

Human embryo with heart and anterior body-wall removed to show the sinus venosus and its tributaries.

(After His.)

  • The right umbilical and right vitelline veins shrivel and disappear
  • the left umbilical becomes enlarged and opens into the upper venous ring of the vitelline veins
  • with the atrophy of the yolk-sac the left vitelline vein also undergoes atrophy and disappears
  • a direct branch is established between this ring and the right hepatic vein
  • this branch is named the ductus venosus

ductus venosus

  • at the porta hepatis (transverse fissure of the liver) the umbilical vein divides into two branches
  1. the larger is joined by the portal vein, and enters the right lobe
  2. the smaller is continued upward (ductus venosus) and joins the inferior vena cava
  • forms a wide channel
  • blood returned from the placenta is carried directly to the heart without passing through the liver




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Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.


Cite this page: Hill, M.A. (2024, May 29) Embryology Gray0476.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray0476.jpg

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

File history

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Date/TimeThumbnailDimensionsUserComment
current11:19, 6 May 2011Thumbnail for version as of 11:19, 6 May 2011600 × 609 (99 KB)S8600021 (talk | contribs)
11:18, 6 May 2011Thumbnail for version as of 11:18, 6 May 2011600 × 609 (63 KB)S8600021 (talk | contribs)
11:17, 6 May 2011Thumbnail for version as of 11:17, 6 May 2011600 × 609 (53 KB)S8600021 (talk | contribs)
22:25, 11 October 2009Thumbnail for version as of 22:25, 11 October 2009493 × 500 (44 KB)S8600021 (talk | contribs)Human embryo with heart and anterior body-wall removed to show the sinus venosus and its tributaries. (After His.)