What are the functions of the alveoli?
Alveoli are tiny sacs in the lungs that perform gas exchange.
That is the main process of respiration where the body gets rid of
carbon dioxide and picks up oxygen which is used in metabolism.
They have supply of oxygenated and de-oxygenated blood surrounding
their surface giving them a high blood supply. They also have thin
walls and a moist surface. This is all required for them to work