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How does the movement of muscles attached to the ribcage and diaphragm initiate expiration? (3 points)
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How does the movement of muscles attached to the ribcage and diaphragm initiate

expiration? (3 points)

User Johnildergleidisson
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The muscles relax, which pulls the rib age downward and decreases the volume of the chest cavity.
User Javier Vieira
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