Emphysema. Definition

Medical Definition: Emphysema

Pulmonary emphysema is a disorder affecting the alveoli (tiny air pockets) in the lungs. The transfer of oxygen and carbon dioxide in the lungs takes place in the walls of the alveoli. In the case of emphysema, the alveoli become abnormally inflated, damaging their walls and breathing becomes difficult. People who smoke or who suffer from chronic bronchitis are at higher risk for emphysema.

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