Anatomy Questions (1) for USMLE, MCCEE, PLAB, FCPS, PDMC,MRCP………

Ligamentum venosum separates the caudate lobe and the left lobe of the liver. It is formed by the closure of fetal ductus venosus right after birth.

What is the function of ductus venosus before birth?

A-  Carries blood to the fetus from the placenta

B-  Carries blood to the placenta from the fetus

C-  Connects the pulmonary artery to the aorta

D-  Connects the superior to the inferior vena cava

E-  Connects the umbilical vein to the inferior vena cava


Fetal ductus venosus carries blood from the umbilical vein directly to the inferior vena cava to bypass the fetal liver. It transfers the oxygenated blood to the fetal heart to be distributed to the fetal tissues. Umbilical vein carries oxygenated blood to the fetus and umbilical arteries carried the deoxygenated blood from the fetus to the placenta. Ductus arteriosus connects the pulmonary artery to the aorta. There is no connection between the superior and inferior vena cava.

The correct answer is E

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