Moon10 Posted June 10, 2018 Share Posted June 10, 2018 We know that the ligamentum venosum is the fibrous remnant of the ductus venosus. But why is it located on the external surface of the liver? I mean, the ductus venosus is inside the liver parenchyma, so I don't understand why its remnant can be seen externally. Can you help me? Link to comment Share on other sites More sharing options...
StringJunky Posted June 10, 2018 Share Posted June 10, 2018 Do you know it's a foetal remnant and not an evolutionary one? Quote The ligamentum venosum is the fibrous remnant of the ductus venosus* of the fetal circulation. Usually, it is attached to the left branch of the portal vein within the porta hepatis. It may be continuous with the round ligament of liver. https://en.wikipedia.org/wiki/Ligamentum_venosum * In the fetus, the ductus venosus (Arantius' duct after Julius Caesar Aranzi[1]) shunts a portion of the left umbilical vein blood flow directly to the inferior vena cava.[2] Thus, it allows oxygenated blood from the placenta to bypass the liver. https://en.wikipedia.org/wiki/Ductus_venosus Does that help? Link to comment Share on other sites More sharing options...
Moon10 Posted June 10, 2018 Author Share Posted June 10, 2018 Yes, but in the foetus the ductus venosus is inside the liver, so when it obliterates it should remain inside the organ. Link to comment Share on other sites More sharing options...
StringJunky Posted June 11, 2018 Share Posted June 11, 2018 14 hours ago, Moon10 said: Yes, but in the foetus the ductus venosus is inside the liver, so when it obliterates it should remain inside the organ. I don't know the answer to that. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now