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What does contraction of the diaphragm do to the thoracic chamber?
ALeaves its volume unchanged
BNarrows it from side to side
CEnlarges it front to back
DShortens it front to back
Answer & Solution
Correct answer: C. Enlarges it front to back
A contracting diaphragm flattens and increases thoracic volume along the antero-posterior axis.
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