For air to remain in the lungs,the pressure in the lungs must be equal to or less than atmospheric pressure.

Question

Quizplus · Accepted Answer

This is because air will flow from a region of high pressure to low pressure, so if the pressure in the lungs is greater than atmospheric pressure, the air will flow out. Therefore, to keep air in the lungs, the pressure inside the lungs must either be equal to or less than atmospheric pressure.

For Air to Remain in the Lungs,the Pressure in the Lungs