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Princessmagallanesgo
Answered

What happen during in inhalation?
A. the ribs and diaphragm contract.
B. the ribs and diaphragm relax.
C. the chest cavity becomes smaller.
D. air rushes out of the lungs.​

Sagot :

Answer:

The answer is A.

Explanation:

When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside.

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