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 travels down the trachea – or windpipe – into one of two bronchi and into bronchioles before entering one of millions of alveoli, where gaseous exchange takes place. When we breathe out ...

The condition causes substances such as fats and proteins to accumulate in the alveoli, the ‘air sacs’ of the lung, where oxygen and carbon dioxide enter and exit the blood stream. This ...