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Volume/Capacities

Volumes and capacities involved with respiration

QuestionAnswer
Tidal Volume Volume of air inhaled and exhaled during respiration (air that's exchanged)
TV 500-700cc
Inspiratory Reserve Volume amount of air that you can force into your lungs beyond tidal volume (gulp at the end)
IRV 1500-2500cc
Expiratory Reserve Volume amount of air that you can force out of your lungs beyond tidal volume
ERV 1500-2000cc
Residual Volume the air that remains in the lungs and airways even after a maximum exhalation.
RV 1000-1500cc
Dead air found in dead air spaces (nasal cavities, larynx, trachea, bronchi) Last air that inhaled, first air exhaled
Inspiratory Capacity maximum amount of air that you can force into your lungs upon normal expiration
IC TV+IRV
Vital Capacity All the air that you can force out of your lungs after maximum inspiration. Total useable air.
VC IRV+TV+ERV or TLC-RV
Functional Residual Capacity the air in lungs and airways at the resting expiratory level
FRC ERV+RV
Total Lung Capacity quantity of air the lungs are capable of holding at the height of max. inhalation
TLC TV+IRV+ERV+RV
Created by: bertaka