Blood that drains into the liver from the hepatic portal system has already been through one set of capillaries.

Question

Quizplus · Accepted Answer

Blood from the hepatic portal system comes from the capillary beds in the digestive organs and spleen, and then enters the liver sinusoids, which are specialized capillaries within the liver. Therefore, the blood has already passed through one set of capillaries before entering the liver.

Blood That Drains into the Liver from the Hepatic Portal