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Q13 (a). Distinguish between IRV and ERV
Answers (1)
Difference between the IRV and ERV are given below:
IRV:
- Total lung capacity minus the volume of air in the lung at the end of a normal inspiration. This means that we have a reserve volume that we can tap into as tidal volume increases with exercise or activity.
- IRV is about 2500 – 3500 mL in the human lungs.
ERV:
- Difference between the volume of air left in the lung at the conclusion of normal expiration versus at the conclusion of maximal expiration. That means that we have a "reserve" volume which we can tap into when our tidal volume increases with exercise or activity.
- ERV is about 1000 – 1500 mL in the human lungs.
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