Q. 24.4( 5 Votes )
Write the events that occur during the process of breathing in humans.
Breathing in humans is divided into 2 steps
(i) Inhalation:- diaphragm contracts and move downwards, rib cage moves outward with the help of intercostal muscles. Thus the size of thoracic cavity increases, its pressure gets reduced and air rushes in.
(ii) Exhalation:- diaphragm gets relaxed and move outwards, rib cage moves inward with the help of intercostal muscles. Thus the size of thoracic cavity decreases, its pressure gets increased and air rushes out.
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