This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Vessels of Abdomen and Pelvis, Subject name: Anatomy
Majority of the afferent blood supply to liver is from 
Select and explain. 
A. Hepatic vein, B. Hepatic artery, C. IVC, D. Portal vein
D: Portal vein
Answer: D: Portal vein 
Explanation: Ans d): Portal veinThe liver is the largest gland in the body Its three basic functions are:* bile production & secretion* metabolism of fat, carbohydrate & protein* Blood filtration (removal of bacteria & foreign particles gained en trance from intestine)It has dual supplyHepatic artery - oxygenated blood - 30%Portal vein - venous blood rich in products of digestion -70%.