Using the text, another goal is to look up the definition of each of the volumes and capacities, in the context of the ventilation cycle, so that you can then explain each of the changes in that context"
ANSWER: TIDAL VOLUME: Air that enters into the lings during quiet respiration, about 500ml.
Residual volume: Air in the lungs even after maximal expiration. It cannot be measured by spirometry.
Inspiratory reserve volume: Air that can still be breathed in even after normal inspiration.
Expiratory reserve volume: Ait that can be exhaled even after normal expiration.
Inspiratory capcity: IRV + TV. Air that can be breathed in after normal exhaltion.
Functional residual capacity: ERV+ RV. Volume of gas in lungs after normal expiration.
Vital capacity: TV + IRV+ ERV. Maximum volume of gas that can be expired after maximum inspiration.
Total lung capacity: TV+IRV+ERV+RV. Volume of gas present in lungs after maximal inspiration. It cannot be measured by spirometry.
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