Chapter 22: Respiratory Volumes and Capacities

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8 Terms

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Tidal volume (TV)

Amount of air that moves in and out of the lungs during a normal breath (500ml)

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Inspiratory Reserve Volume (IRV)

Amount of air that can be forcefully inhaled after a normal tidal volume inhalation (2100-3200ml)

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Expiratory reserve volume (ERV)

Amount of air that can be forcefully exhaled after a normal tidal volume exhalation (1000-1200ml)

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Residual Volume (RV)

amount of air that always remains in the lungs. Needed to keep alveoli open and prevent lung collapse

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Inspiratory Capacity (IC)

TV + IRV. Total amount of air that be inspired after normal tidal expiration

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Functional Residual Capacity (FRC)

ERV + RV. Air remaining in lungs after normal tidal expiration

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Vital Capacity (VC)

TV + IRV + ERV. Total amount of exchangeable air

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Total Lung Capacity (TLC)

TV + ERV + IRV + RV . Sum of all the lung volumes