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Cards In This Set
| Front | Back |
 Pulmonary ventilation |
The respiratory system is responsible for the movement of air in and out of the lungs.
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Inspiration
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The act of drawing air into the lungs. The major muscle of inspiration is the diaphragm, the contraction of which creates a reduced pressure in the chest
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Expiration
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As the thoracic diaphragm relaxes during exhalation it causes the tissue it has depressed to rise superiorly and put pressure on the lungs to expel the air.
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Elastic Recoil
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Is the rebound of the lungs after having been stretched by inhalation, or rather, the ease with which the lung rebounds.
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 Spirometer |
An instrument for measuring the air capacity of the lungs.
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Spirometry
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Is the first and most commonly done lung function test. It measures how much and how quickly you can move air out of your lungs.
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 Spirogram |
A graphic record of respiratory movements traced on a revolving drum.
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Tidal Volume (TV)
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Is the lung volume representing the normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied.
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 Spirograph |
An instrument for recording breathing movements.
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Tidal Volume (fact)
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In a healthy, young human adult, tidal volume is approximately 500 mL per inspiration or 7 mL/kg of body mass.
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Expiratory Reserve Volume (ERV)
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Is the additional amount of air that can be expired from the lungs by determined effort after normal expiration.
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Inspiratory Reserve Volume (IRV)
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Is the maximal amount of additional air that can be drawn into the lungs by determined effort after normal inspiration.
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Residual Volume (RV)
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Is a lung volume representing the amount of air left in the lungs after a forced exhalation; this volume cannot be measured, only calculated.
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Vital Capacity (VC)
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Is the greatest volume of air that can be expelled from the lungs after taking the deepest possible breath.
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Vital Capacity (equation)
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VC = TV + IRV + ERV
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