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Human Respiratory System : Structure and Function

Which of the ...

Question

Which of the following maintains the volume of air in the chest cavity during breathing?

A

Diaphragm

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B

Lungs

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C

Breastbone

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D

None of the above

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Solution

The correct option is A Diaphragm
The diaphragm is a dome-shaped, muscular and membranous structure that separates the chest and abdominal cavities in mammals. It is the principal muscle of respiration that maintain the volume of air in the chest cavity during breathing.
So the correct answer is 'Diaphragm'.

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