What are the air sacs in the lungs that facilitate gas exchange?

The air sacs in the lungs that facilitate gas exchange are called alveoli. These tiny, balloon-like structures are clustered at the end of the respiratory tree and play a critical role in the exchange of oxygen and carbon dioxide between the air and bloodstream.

Alveoli are surrounded by a network of capillaries, allowing for the diffusion of oxygen from the air within the alveoli into the blood, while carbon dioxide moves from the blood into the alveoli to be exhaled. This highly efficient process is crucial for maintaining proper oxygen levels in the body and removing waste gases.

Understanding the function of alveoli highlights their importance in respiratory health. Conditions affecting the alveoli, such as pneumonia or emphysema, can significantly impair gas exchange, underscoring their vital role in the respiratory system.