Question

explain in detail how airfare enters and leaves the lungs

Answer 1

The cartilaginous diaphragm when contracts increases the surface area for lungs which spreads thereby reducing air pressure in it. The pressure of air at the nostrils is more and hence the air flows from higher pressure area to lower pressure. This is inhalation. When the diaphragm relaxes it pushes the lungs there by increasing the pressure on them and the surface area reduces and hence pressure of air in lungs is more which is given out from the nostrils. This is exhalation.

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