Question

. Which muscular part of the body present in the chest cavity helps air to be breathed in and out?

Answer 1

Diaphragm

The diaphragm, a dome-shaped sheet of muscle that separates the chest cavity from the abdomen, is the most important muscle used for breathing in (called inhalation or inspiration). The diaphragm is attached to the base of the sternum, the lower parts of the rib cage, and the spine.

Answer 2

Explanation:

your answer is Diaphragm.

when we inhale the muscles between the ribs contract causing rib cage to move upward and the diaphragm moves downwards to the space in the chest cavity increase (that is thoracic cavity).

And when we breathe out or exhale. The rib muscles relax causing the ribs to move downward and inward. The diaphragm here relaxes and moves upwards which causes the space in thoracic cavity to decrease.

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