These lead to tiny air sacs known as alveoli. Alveoli absorb oxygen from the air a person inhales and pass it into the bloodstream. They also remove carbon dioxide from the blood, which a person ...

Alveoli are tiny, balloon-shaped air sacs located at the end of the bronchioles, the branch-like tubes in the lungs. The alveoli move oxygen and carbon dioxide (CO 2) molecules into and out of your ...

pneumonia causes the air sacs (alveoli) in your lungs to become inflamed and fill with fluid. This makes it harder for you to breathe and can become life-threatening. Bronchiolitis. An infection of ...