When this muscle contracts, does the size of the thoracic cavity increase or decrease?
Added by Austin M.
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In the case of the thoracic cavity, the muscle that is commonly associated with its contraction is the diaphragm. Show more…
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When the inspiratory muscles contract, (a) the size of the thoracic cavity increases in diameter, (b) the size of the thoracic cavity increases in length, (c) the volume of the thoracic cavity decreases, (d) the size of the thoracic cavity increases in both length and diameter.
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