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What is the mechanism which causes air to enter a person’s lung when inhaling?:
The decrease in lung volume.
The chemical difference between oxygen and carbon dioxide .
The force of the person drawing in air by breathing.
The difference in atmospheric pressure in the lungs.

Respuesta :

Jazz1978

Answer:

I believe it;s the difference in pressure

Explanation:

This is caused by the diaphragm contracting and therefore expanding the thoracic cavity. This increase in volume causes a decrease in pressure.

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