Respiratory and Circulatory Systems Quick Check What function do the alveoli perform?

Answer 1

The alveoli are tiny air sacs located in the lungs that play a crucial role in gas exchange. Their primary function is to facilitate the exchange of oxygen and carbon dioxide between the air and the blood. When you inhale, oxygen from the air fills the alveoli and diffuses into the surrounding capillaries, where it binds to hemoglobin in red blood cells. At the same time, carbon dioxide, a waste product of metabolism, diffuses from the blood into the alveoli to be exhaled. This process is essential for maintaining proper oxygen levels in the bloodstream and removing carbon dioxide from the body.