Lung volumes
Lung volumes and lung capacities refer to the volume of air in the lungs at different phases of the respiratory cycle.
The average total lung capacity of an adult human male is about 6 litres of air. Wikipedia
ERV: Expiratory reserve volume: the maximal volume of air that can be exhaled from the end-expiratory position
FEFmax: The maximum instantaneous flow achieved during a FVC maneuver
FEV1: Volume that has been exhaled at the end of the first second of forced expiration
FVC: Forced vital capacity: the determination of the vital capacity from a maximally forced expiratory effort
IC: Inspiratory capacity: the sum of IRV and TV
RV/TLC%: Residual volume expressed as percent of TLC