In which blood vessels do the exchange of gases and other materials occur?

Question

Quizplus · Accepted Answer

The exchange of gases and other materials between blood and tissues occurs in the capillaries, which are tiny blood vessels with very thin walls that allow for diffusion of oxygen, carbon dioxide, and other molecules. Arteries and veins are larger blood vessels that transport blood to and from the capillaries, but they do not participate directly in gas and material exchange. The right atrium is a chamber of the heart and does not serve a direct role in gas exchange.

In Which Blood Vessels Do the Exchange of Gases and Other