Question

which of the following statements describes the function of the diaphragm?
A. It contract and relaxes during respiration to change the volume of the chest cavity
B. It serves as the passage of air into the lungs
C. It carries blood throughout the body
D. It is the site of gas exchange ​

Answer 1

Answer:

a, b

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Answer 2

Answer:

the answer is A

Explanation:

it contracts and relaxes during respiration to change the volume of the chest cavity