Inspiratory capacity

Define functional residual capacity, inspiratory capacity, total lung capacity, and vital capacity... 

Total lung capacity Inspiratory capacity Functional residual capacity... 

Inspiratory capacity Maximum volume of gas that can be inhaled from FRC level... 

Inspiratory capacity Volume inspired maximally after a normal expiration = TV + IRV... 

The functional residual capacity (FRC) is the volume of air remaining in the lungs at the end of a quiet expiration. FRC is the normal resting position of the lung and occurs when there is no contraction of either inspiratory or expiratory muscles and is normally 40% of TLC. Inspiratory capacity (IC) is the maximal volume of air that can be inhaled from the end of a quiet expiration and represents the sum ofVT and IRV. 

FIGURE 25-1. Lung volumes and capacities. ERV = expiratory reserve volume FRC = functional residual capacity IC = inspiratory capacity IRV = inspiratory reserve volume RV = residual volume TLC = total lung capacity VC = vital capacity Vj = tidal volume. 

FIGURE 7.5 Typical spirometry tracing obtained during testing inspiratory capacity (IC), tidal volume (TV), forced vital capacity (FVC), forced expiratory volume (FEV), and forced expiratory flows. Dashed line represents a patient with obstructive lung disease solid line represents a normal, healthy individual. 

IC (inferior colliculi), 5-11-5-12 IC (inspiratory capacity), 7-6 ICC (interstitial cells of Cajal), in gastrointestinal system, 6-4,6-8... 

---