alleryStart learning →When you breathe in, what happens to your diaphragm?
AIt relaxes and domes up
BIt stays perfectly still
CIt flattens and moves down
DIt folds into the lungs
Answer & Solution
Correct answer: C. It flattens and moves down
The contracting diaphragm flattens and moves down, which enlarges the chest cavity so air flows in.
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