Lung Alveoli and Oxygen Exchange

An illustration detailing the crucial process of oxygen exchange within the human lungs. It depicts how oxygen molecules, shown as green spheres, move from the microscopic air sacs called alveoli into the surrounding pulmonary blood vessels. This vital mechanism ensures that the blood becomes oxygenated, ready to be transported throughout the body.

lungs - alveoli - oxygen - gas exchange - respiration - bloodstream - biology