Lung Capacity

Fritz Anatomy 2022-2023

tidal volume

amount of air normally inhaled or exhaled; 1/2 liter

expiratory reserve volume

forceful exhale of air past tidal breathing; 2 liters

total lung capacity

all air present in lungs, average person has 6 liters

inspiratory reserve volume

all the air that can be inhaled past tidal volume; about 2 liters

functional residual capacity

all the air that stays in lungs after tidal breathing (includes expiratory reserve volume and residual volume)

inspiratory capacity

all the air that can be taken in (tidal volume and inspiratory reserve volume)

residual volume

amount of air always present in lungs that can never be exhaled; 1.2 liters

vital capacity

maximum amount of air that can be inhaled and exhaled (doesn’t include residual volume)

12-20

average adult amount of breaths per minute

29\.6-30.2 inches of Hg

average air pressure