It splits into smaller and smaller branches in your lungs. At the end of each branch are tiny air sacs called alveoli. This is where oxygen goes into your blood and carbon dioxide comes out.

What these tiny sacs in the lungs do and conditions that can affect them Medically reviewed by Susan Russell, MD Alveoli are ...

Bronchitis affects the bronchial tubes that carry air to your lungs. Pneumonia affects the air sacs, called alveoli, where oxygen passes into your blood. Pneumonia causes these air sacs in the ...

It comes in several forms, one of which is emphysema, which causes progressive damage to the air sacs or alveoli of the lungs. Typical symptoms associated with underlying lung damage include ...

When you inhale, air enters through your nose and mouth and makes its way into your lungs. It enters the balloon-like air sacs, called alveoli. From there, oxygen moves into your bloodstream to be ...

Pneumonia is a severe inflammation of the lungs in which the thin tissue around air spaces called alveoli swells and fills with fluid. Symptoms include shaking, chills, a rapidly rising fever ...

Gas exchange is a process that involves the swapping of gases that occurs at exchange surfaces such as the alveoli found within your lungs. Gas exchange allows oxygen to travel into your cells for ...