Question

gases, nutrients, and waste products are exchanged between _______ and the cells of the body.
arterioles
capillaries
veins

Explanation:

Capillaries are the smallest blood vessels where gas, nutrient, and waste - product exchange occurs between the blood and body cells. Arterioles carry blood away from the heart to capillaries and veins carry blood back to the heart.

Answer:

B. capillaries