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Question


Breathing:
  1. ventilates lungs
  2. draws air into airways
  3. expels air from airways
  4. all of these

A
all of these
B
expels air from airways
C
ventilates lungs
D
draws air into airways
Solution
Verified by Toppr

Breathing is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, by bringing in oxygen & expelling out carbon dioxide.
So, the correct option is 'all of these'.

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