The ductus venosus shunts oxygenated umbilical venous blood directly into the IVC, bypassing the hepatic sinusoids. The ductus venosus is a derivative of which embryological vessel and becomes which adult ligament after birth?
- A Right umbilical vein; becomes the ligamentum teres hepatis
- B Left umbilical vein; becomes the ligamentum teres hepatis
- C Right vitelline vein; becomes the coronary ligament
- D Part of the left vitelline vein; becomes the ligamentum venosum in the fissure of Arantius ✓
Explanation
The ductus venosus is a channel within the liver connecting the left portal vein (receiving left umbilical vein blood) to the left hepatic vein/inferior end of IVC. It is derived from the left vitelline (hepatic) venous network. After birth, it closes (functional closure within minutes due to loss of umbilical blood flow; anatomical closure by fibrous tissue within 2–3 weeks) to become the ligamentum venosum, which lies in the fissure of Arantius on the posterior surface of the liver. The left umbilical vein itself becomes the ligamentum teres hepatis (round ligament of the liver) in the free margin of the falciform ligament.
Reference: BD Chaurasia's Human Anatomy, 8th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.