Define the key measures of lung capacity

Expiratory capacity (EC): all the air breathed out in a maximal exhalation after a normal breath (VT + ERV) Functional residual capacity (FRC): the volume of air remaining in the lungs at the end of a normal expiration (ERV + RV). Total lung capacity (TLC): all the air that it is possible for the lungs to contain (RV + ERV + VT + IRV). Vital capacity (VC): all the air that can be expired from a maximal inhalation (ERV + VT + IRV). Inspiratory capacity (IC): all the air breathed in during a maximal inhalation at the end of a normal exhalation (VT + IRV).