In Vertebrate Circulatory Systems,exchange Between the Blood and Extracellular Fluid

Question

In vertebrate circulatory systems,exchange between the blood and extracellular fluid occurs through
A)capillaries.
B)venules.
C)arterioles.
D)arteries.
E)veins.

Accepted Answer

Capillaries are the smallest vessels in the circulatory system and their walls are thin, allowing for diffusion of gases, nutrients, and waste products between the blood and surrounding tissues.