This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Ligamentum teres is: 
Select and explain. 
A. Remnant of ductus aeriosus, B. Remnant of umbilical vein, C. Remnant if ductus venosus, D. Remnant of umbilical aery
B: Remnant of umbilical vein
Answer: B: Remnant of umbilical vein 
Explanation: After bih, the left umbilical vein are obliterated and forms the ligamentum teres hepatisLigamentum teresIt is the obliterated fibrous remnant of the left umbilical vein of the fetus.It originates at the umbilicus.It passes superiorly in the free margin of the falciform ligament.From the inferior margin of the liver, it may join the left branch of the poal vein or it may be in continuity with the ligamentum venosumOther fetal remnantsUmbilical aeries forms medial umbilical ligamentDuctus venosus forms ligamnetum venosusmDuctus aeriosus forms ligamnetum aeriosum