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Tidal Volume (TV)
the amount of air you move into or out of your lungs during a single respiratory cycle under resting conditions
Expiratory Reserve Volume (ERV)
the amount of air that your can voluntarily expel after you have completed a normal, quiet respiratory cycle
Inspiratory Reserve Volume (IRV)
the amount of air that you can breathe in over and above the tidal volume
Inspiratory Capacity (IC)
the amount of air that you can draw into your lungs after you have completed a quiet respiratory cycle
Vital Capacity (VC)
the maximum amount of air that you can move into or out of your lungs in a single respiratory cycle
Residual Volume (RV)
the amount of air that remains in your lungs even after a maximal inhalation
Total Lung Capacity (TLC)
the total volume of your lungs
anatomic dead space
the volume of air filling the parts of the respiratory tract where gas exchange does not occur (150mL)
TV+ERV equals
expiratory capacity
TV+IRV equals
inspiratory capacity
IRV+TV+ERV equals
vital capacity
VC+RV equals
total lung capacity
500mL in, 500mL out equals
tidal volume
these muscles are used during normal inspiration
external intercostals diaphragm
muscles used during forced exhalation
internal intercostals external and internal obliques rectus abdominus
muscles used during forced inhalation
sternocleidomastoid pectoralis minor
TLC calculation
TLC = FRC + IC
(Total lung capacity = functional residual volume + inspiration capacity )
(Inspired volume) 6000-3000(tidal volume) = 3000
