describe how pressure differences cause you to exhale?
- 1 decade agoFavorite Answer
The act of exhaling changes the shape of your diaphragm, decreasing the space available in the chest. This raises the pressure in the lungs to above the atmospheric pressure, so the excess pressure is expelled. You do not, however get rid of all the air in your lungs.
Inhaling is the opposite process, the expanding chest area lowers the pressure in your lungs to below atmospheric pressure and air comes in the meet the balance.