In vertebrates, exchange of substances between the blood and the interstitial fluid occurs in the
A) arteries.
B) arterioles.
C) capillaries.
D) veins.
E) venules.

Question

Quizplus · Accepted Answer

Capillaries are the primary site of exchange between the blood and interstitial fluid. They have thin walls that allow for easy diffusion of molecules such as oxygen, carbon dioxide, and nutrients. Arteries, arterioles, veins, and venules are involved in directing blood flow to and from the capillaries, but do not play a significant role in exchange at the cellular level.

In Vertebrates, Exchange of Substances Between the Blood and the Interstitial