A: Emphysema is a chronic obstructive- disease of lung, causing irreversible distension and loss
Channel: Doubtnut
Date: 2020-02-17

A: Emphysema is a chronic obstructive- disease of lung, causing irreversible distension and loss of elasticity of alveoli. R: Emphysema is preventable if chronic exposure to smoke (cigarette and others) and pollutants is avoided.