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Which muscles, when contracted, would increase the volume of air in the thoracic cavity?

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User Omroy
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1 Answer

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Contraction of both the diaphragm (the diaphragm flattens) and the external intercostals (pulls the ribs up and out) will increase the volume of the thoracic cavity. This will cause air to move into the lungs (inspiration).
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User GoannaGuy
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