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:

  • A
    Asthma
  • B
    Silicosis
  • C
    Emphysema
  • D
    Anosmia

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Differentiate between: Emphysema and occupational respiratory disorders.

Smoking leads to ................. in the blood.

In $emphysema$,what happens to the lungs?

Asthma is caused by

Chronic respiratory disorders like $.......$ are caused by pollen grains.

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