Which of the following statements best describes a portal system?
A) The portal system allows enough pressure to be generated to close the foramen ovale in the fetal heart.
B) The portal system refers to ports located in the veins (which does not allow for the backflow of blood).
C) Blood flows from one capillary bed to another, bypassing general circulation.
D) Blood flows in one direction throughout the circulatory system.
E) The portal system is the same as parallel flow.

Question

Quizplus · Accepted Answer

The portal system is characterized by blood flowing from one capillary bed to another through a vein, bypassing the general (systemic) circulation. This is seen in the hepatic portal system, where blood from the gastrointestinal tract flows to the liver before returning to the heart.

Which of the Following Statements Best Describes a Portal System