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Andrew Guenther · Answer 1 · 2023-09-19T04:59:03+0000

Answer:

Contraction of inspiratory muscles

Step-by-step explanation:

The contraction of inspiratory muscles causes pressure changes, which drive airflow into the lungs. Contraction of the inspiratory muscles: diaphragm and external intercostal muscles actively increase the size of the thorax during inspiration.

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