Question

describe the mechanism of breathing of human beings

Answer 1

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YOUR ANSWER..

Breathing consists of two phases called inhalation and exhalation. In order for air to be drawn into the lungs during inhalation the volume of the thorax must increase. This is brought about due to the contraction ofrespiratory muscles.

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Answer 2

first we take oxyegen from nose than from nose it comes in our lungs &in lungs it get pure and dissolves in oxygen and carbon dioxide release outside from nose hope its help u