What does the avoleous do?

The alveolus (plural: alveoli) is a tiny air sac in the lungs where the exchange of oxygen and carbon dioxide occurs. They are the endpoint of the respiratory system, allowing oxygen from inhaled air to pass into the bloodstream while facilitating the removal of carbon dioxide from the blood. The structure of the alveoli, with their thin walls and large surface area, maximizes this gas exchange process, which is essential for respiration and overall bodily function.