The diffusion of oxygen and nutrients from the blood into the body tissues occurs in the:
A)heart.
B)aorta.
C)lungs.
D)capillary beds.

Question

Quizplus · Accepted Answer

Capillary beds are the site of diffusion of oxygen and nutrients from the blood into the body tissues. Capillaries have thin walls, which allows for efficient diffusion of small molecules, such as oxygen and nutrients, into the surrounding tissues. The heart, aorta, and lungs are all involved in the transport of oxygen and nutrients to the capillary beds, but the actual diffusion occurs in the capillaries themselves.

The Diffusion of Oxygen and Nutrients from the Blood into the Body