Biology for IGCSE & O level - Gas Exchange In Humans (Section 5 - No. 3)
Which of the following is a direct result of the contraction of the diaphragm?
The lungs expanding.
The rib cage contracting.
Exhalation occurring.
The trachea narrowing.
Explanation
Diaphragm contraction increases the chest cavity volume, which expands the lungs.
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