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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