Human Anatomy & Physiology Laboratory Manual, Main Version: Excercise 37 Respiratory System Physiology Flashcards


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Breathing Volumes and Capacities
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1

tidal volume

volume moved in or out during a normal breath

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inspiratory reserve volume

volume that can be inhaled during forced breathing in addition to tidal volume

3

expiratory reserve volume

volume that can be exhaled during forced breathing in addition to tidal volume

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residual volume

volume that remains in lungs at all times

5

inspiratory capacity =

TV + IRV

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functional residual capacity =

ERV + RV

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vital capacity =

TV + IRV + ERV

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total lung capacity =

VC + RV

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Respiratory Volumes and Capacities

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10

minute ventilation

*tidal volume multiplied by breathing rate

*amount of air that is moved into the respiratory passageways

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alveolar ventilation rate

major factor affecting concentrations of oxygen and carbon dioxide in the alveoli

volume of air that reaches alveoli

tidal volume minus physiologic dead space then multiplied by breathing rate

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Tidal Volume (TV)

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The volume of one breath

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Inspiratory Reserve Volume (IRV)

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Additional volume inhaled while taking a very deep breath

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Expiratory Reserve Volume (ERV)

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Volume of air in excess of TV that can be exhaled forcibly

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Residual Volume (RV)

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Volume of air still contained in the lungs after a maximal expiration

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Vital Capacity (VC)

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IRV + TV + ERV

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Total Lung Capacity (TLC)

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TV + IRV + ERV + RV

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Minute Respiratory Volume (MRV)

Tidal Volume X (Breaths/minute)

i.e 500ml/breath x 12 br/m = 6,000ml/min