All gas exchange between the vascular system and tissues occurs in
A)venules.
B)capillaries.
C)arterioles.
D)veins.

Question

Quizplus · Accepted Answer

Gas exchange between the vascular system and tissues occurs in the smallest blood vessels called capillaries. Oxygen diffuses out of the capillaries and into the tissues, while carbon dioxide diffuses out of the tissues and into the capillaries for transport back to the lungs.

All Gas Exchange Between the Vascular System and Tissues Occurs