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Residual volume

Volume of air that remains in the lungs after the most forceful expiration

Expiratory reserve volume

Maximum voume of air that can be expired after a normal expiration

vital capacity

maximum volume of air that a person can exhale or inhale

inspiratory capacity

maximum amount of air that can be inspired after a normal expiration

total lung capacity

maximum volume of air that the lungs can hold after a maximum forced inspiration

inspiratory reserve volume

volume of air that can be forcefully inspired after a normal inspiration

expiratory capacity

maximum voume of air that can be forcefully exhaled after a normal inhalation

tidal volume

amount of air that is normally inspired or expired

functional residual capacity

volume of air remaining in the lungs after a normal expiration


CO2 increases and Ph decreases


CO2 decreases and Ph decreases

external respiration

O2 greater in aveoli than blood

internal respiration

O2 greater in blood than aveoli






=Vt x respiratory rate





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