Question

explain the process of mechanism of breathing.
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Answer 1

Answer:

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

Explanation:

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Answer 2

Answer:

the process of breathing is aided by the rhymethic expansion and the contraction of the thoaric activity :

breathing involves in two steps:

I. Inhalation

II. Exhalation.

Inhalation : Entry of air from the atmosphere into the lungs is called inhalation.

Exhalation : expelling of carbon dioxide from the lungs is called exhalation.

Explanation:

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