The exchange of nutrients and gases between the blood and tissue cells is the primary function of ________.

A) veins
B) arteries
C) arterioles
D) capillaries
E) venules

Nutrients

Substances obtained from food that are essential for growth, metabolism, and overall health.

Gases

Substances that exist in the gaseous state at standard temperature and pressure.

Capillaries

Microscopic blood vessels that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between the blood and tissues.