Question

Explain Mechanism of Breathing???

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Answer 1

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.

Step-by-step explanation:

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Answer 2

Answer:

When the lungs inhale, the diaphragm contracts and pulls downward. ... As a result, air rushes in and fills the lungs. The second phase is called expiration, or exhaling. When the lungs exhale, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases.

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