Question

explain the machanism of breathing

Answer 1

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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..


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Answer 2

Answer:

Breathing occurs when the contraction or relaxation of muscles around the lungs changes the total volume of air within the air passages (bronchi, bronchioles) inside the lungs. When the volume of the lungs changes, the pressure of the air in the lungs changes in accordance with Boyle's Law.