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Air is forced into the lungs by the contraction of the a. alveoli. c. diaphragm. b. bronchioles. d. heart.
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Air is forced into the lungs by the contraction of the

a. alveoli.
c. diaphragm.
b. bronchioles.
d. heart.

User Lucas Pires
by
8.3k points

1 Answer

1 vote
It is the Diaphragm
User Sob
by
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