_______ have thin, permeable walls and are the sites for exchange of nutrients, wastes, respiratory gases, and hormones.
A) Arteries
B) Veins
C) Capillaries
D) Arterioles
E) Venules

Question

Quizplus · Accepted Answer

Capillaries have thin, permeable walls and are the sites for exchange of nutrients, wastes, respiratory gases, and hormones. Arteries and veins have thicker walls and are responsible for transporting blood to and from the capillaries. Arterioles and venules are smaller vessels that connect arteries and veins, respectively, to the capillaries.

_______ Have Thin, Permeable Walls and Are the Sites for Exchange