what is mechanism of breathing
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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. ... Inspiration occurs when the inspiratory muscles—that is, the diaphragm and the external intercostal muscles—contract.The mechanism of breathing involves two main processes: inspiration and expiration. ... Expiration occurs when the diaphragm and the intercostal muscles relax. The contraction or relaxation of muscles around the lungs changes the entire volume of air inside the lungs, and so does the pressure.
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. ... Inspiration occurs when the inspiratory muscles—that is, the diaphragm and the external intercostal muscles—contract.
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