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Components
Tidal volume ­ the volume of air that enters and
leaves the lungs at each natural resting breath.
Inspiratory reserve volume (IRV) - the volume of
air that can be taken in over and above the
normal inspired tidal volume.
Expiratory reserve volume (ERV) - the volume of
air that can be expelled over and above the
normal inspired tidal volume.…read more

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Components
Vital capacity (VC) - tidal volume + IRV + ERV
Residual volume (RV) - the volume of air left in the
lungs after the strongest possible expiration.
Total lung capacity (TLC) - the sum of the vital
capacity and the residual volume.
Inspiratory capacity (IC) - the volume that can be
inspired from the end of a normal expiration.…read more

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Ventilation rate
Ventilation
= tidal volume x frequency of inspiration
rate
(dm3min-1)
The ventilation of the
lungs needs to supply all
the oxygen needed by the
tissues of the body and
remove the waste CO2.…read more

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Control and regulation
The basic stimulus to inhale and exhale is
given by an area of the medulla known as the
respiratory centre. It involves a feedback
system based on the stretching of the bronchi
during breathing.…read more

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