Volumes and Capacties of the Respiratory System
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| Tidal Volume (TV) | volume of air exchanged in one cycle of respiration
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| Inspiratory Reserve Volume (IRV) | volume of air that can be inhaled after tidal respiration
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| Expiratory Reserve Volume (ERV) | volume of air that can be expired following passive, tidal expiration
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| Resting Lung Volume | also known as expiratory reserve volume; volume of air that can be expired following passive, tidal expiration
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| Residual Volume (RV) | volume of air remaining in the lungs after a maximum exhalation
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| Dead Air | volume of air within the conducting passageways that cannot be involved in gas exchange (included as a component of residual volume)
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| Vital Capacity (VC) | the volume of air that can be inhaled following a maximal exhalation
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| Vital Capacity (VC) | includes inspiratory reserve volume, tidal volume, and expiratory reserve volume ( = IRV + TV + ERV)
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| Functional Residual Capacity | the volume of air in the body at the ends of passive exhalation
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| Functional Residual Capacity | includes expiratory reserve and residual volumes ( = ERV + RV)
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| Total Lung Capacity (TLC) | the sum of inspiratory reserve volume, tidal volume, expiratory reserve volume and residual volume ( = IC + FRC)
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| Inspiratory Capacity (IC) | the maximum inspiratory volume possible after tidal expiration ( = TV + IRV)
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