Question

Describe the mechanism of breathing in humans ?​

Answer 1

Answer:

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Explanation:

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Answer 2

The pressure of the air we inhale and exhale fluctuates. So, as air pressure drops, the alveolar gaps expand and air enters the lungs (inhalation), and when the pressure of the alveoli within the lungs exceeds the atmospheric pressure, the air is blown out of the lungs (exhalation) (expiration). The amount of the pressure differential determines the pace at which air flows.

There are two parts to the breathing mechanism:

Inspiration \Expiration \Inspiration

• The muscles linked to the ribs on the outside side flex during inspiration, pulling the ribs out and causing the chest cavity to expand.
• The diaphragm later contracts, slides lower, and widens the chest cavity, causing the abdominal muscles to constrict.
• The chest cavity expands, creating a partial vacuum that draws air into the lungs and causes them to fill with air.