Question

Explain the mechanism of breathing?

Answer 1

Mechanics of breathing. When we inhale the intercostal muscles (between the ribs) and diaphragm contract to expand the chest cavity. ... This reduces the size of the thoracic cavity, thereby increasing the pressure and forcing air out of the lungs.

Answer 2

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 of
respiratory muscles. The
diaphragm contracts and flattens
and the intercostal muscles
contract to pull the ribs up and
out.



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