Diffusion of materials between the blood and body tissues occurs at which of the following blood vessels?

Question

Quizplus · Accepted Answer

Capillaries are the smallest and thinnest blood vessels that allow for exchange of materials between the blood and body tissues. Oxygen, nutrients, and other substances diffuse from the capillaries into the tissues, while waste products and carbon dioxide diffuse from the tissues into the capillaries to be transported away. Arteries, veins, arterioles, and venules do not directly participate in the diffusion of materials.

Diffusion of Materials Between the Blood and Body Tissues Occurs