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21-06-2017
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Contraction of the intercostal muscles and the diaphragm causes the thoracic cavity to ____ and air pressure in the lungs to

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soccerabby11 soccerabby11

21-06-2017

contraction of the intercostals and diaphragm cause the thoracic cavity to expand, and the air pressure in the lungs to decrease.

this decrease in pressure then pulls in air from outside, thus inspiration occurs.

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