Biology for IGCSE & O level - Gas Exchange In Humans (Section 1 - No. 27)
What is the function of the diaphragm in breathing?
It filters the air.
It warms the air.
It controls the volume of the chest cavity.
It produces mucus.
Explanation
The diaphragm is a muscle that contracts and relaxes, changing the volume of the chest cavity and influencing breathing.
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