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13 February, 21:45

Describe the movement of air when the diaphragm contracts and relaxes

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  1. 13 February, 21:59
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    During inspiration, the diaphragm contracts and pulls downward while the muscles between the ribs contract and pull upward ... During expiration, the diaphragm relaxes, and the volume of the thoracic cavity decreases, while the pressure within it increases. As a result, the lungs contract and air is forced out.
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