Question

Why is the blood in the hepatic portal vein deoxygenated rather than oxygenated

Answer 1

Answer:

Explanation:

Blood flow to the liver is unique in that it receives both oxygenated and (partially) deoxygenated blood. As a result, the partial gas pressure of oxygen (pO2) and perfusion pressure of portal blood are lower than in other organs of the body.  The hepatic vein subsequently drains into the inferior vena cava.