Air into and out of the lungs. it depends on the volume of the lungs and the pressure gradient.
exchange of gas between the alveoli and blood.
exchange of gases between the blood and the tissues.
if you need to change the pressure change the container.
pressure= 1/volume if you change the volume then you change the pressure.
also called eupnea iss caused by the contraction of the diaphram and the external intercostal.
relaxed expiration is caused by 3 factors
1) muscle tissue relaxation and recoil
2) lung tissue- the recoil of the connective tissue that surrounds the alveoli, its elastic in nature so it wants to recoil back into its regular shape
3) Lung tissue- surface tension, water is a polar molicule thats attracted to itself creating a pressure that wants to pull everything together, the lungs create a detergant that breaks up the polarity and allows you to breath in or else your lungs would just collapse (thats what happens to premes.