Air moves into the lungs when

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(B) Air moves into the lungs during inspiration (inhalation).Inspiration occurs when the pressure within the lungs (intra-pulmonary pressure) is less

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Atmospheric pressure is greater than pressure within the lungs

Vedclass · Answer

(B) Air moves into the lungs during inspiration (inhalation).Inspiration occurs when the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure.This pressure gradient is created by the contraction of the diaphragm and external intercostal muscles,which increases the volume of the thoracic cavity.According to Boyle's Law,an increase in volume leads to a decrease in pressure,causing air to flow from the high-pressure atmosphere into the low-pressure lungs.

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