In heavy smokers alveoli of lungs are enlarged and damaged which reduces surface area for exchange o

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7.Human Health and Disease

medium

In heavy smokers the alveoli of the lungs are enlarged and damaged which reduces the surface area for the exchange of respiratory gases. This condition is called

Asthma

Silicosis

Emphysema

Anosmia

(c)Tobacco smoke may break down the walls of alveoli of the lungs, decreasing the surface area for gas exchange. Causing emphysema.

Standard 12

Biology

medium

(AIIMS-1993)

medium

medium

(NEET-2013)

medium

medium