Breathing and Exchange of GasesHard

Question

Emphysema is characherised by

Options

A.Abnormal distension of alveoli
B.pulmonary haemorrhage
C.Increased number of air sacs
D.Infection of Mycobacterium trabeculae

Solution

-Emphysema is a chronic disorder in which alveolar walls are damaged
due to which respiratory surface is decreased. One of the major causes of
this is cigarette smoking
See ncert page 275

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