What is expiratory capacity in biology?
Expiratory capacity is the maximal volume of air that can be exhaled after completed resting inspiration. Expiratory capacity is equal to the sum of tidal volume and expiratory reserve volume.
What is RV in respiratory system?
Residual volume is the amount of air that remains in a person’s lungs after fully exhaling. Doctors use tests to measure a person’s residual air volume to help check how well the lungs are functioning. It is normal to have some air remain after exhaling to keep the lungs from collapsing.
What is expiratory reserve Erv?

The expiratory reserve volume, ERV, is the additional volume of air that can be expired after a normal or tidal expiration. From: Quantitative Human Physiology, 2012.
What is the inspiratory reserve capacity?
Inspiratory reserve volume (IRV) is the amount of air that can be forcibly inhaled beyond a tidal inhalation (about 3,000 ml for men & 2,000 ml for women).
What is difference between inspiratory capacity and expiratory capacity?
The average lung capacity of an adult is 6 liters….Complete answer:
Inspiratory capacity | Expiratory capacity |
---|---|
After normal expiration, the amount of air inhaled by a person is called inspiratory capacity (IC). | After normal inspiration, the amount of air is exhaled by a person is called expiratory capacity (EC). |
What is the difference between expiratory capacity and expiratory reserve volume?

Tidal volume- the amount of air breathed or exhaled during normal breathing. 2….Distinguish between IRV and ERV.
Inspiratory reserve volume(IRV) | Expiratory reserve volume(ERV) |
---|---|
1. It is the maximum amount of air that can be inhaled after a normal inhalation. | 1. It is the maximum amount of air that can be exhaled out after a normal exhalation. |
What is the difference between TV and RV?
1) Tidal Volume (TV) is the normal volume of air that can be inhaled or exhaled during one respiratory cycle….Complete answer:.
Tidal volume | Residual Volume |
---|---|
It is the total amount of air inhaled or exhaled during regular or relaxed breathing. | It is the volume of air left in the lungs post a forcible expiration. |
What is expiratory reserve volume formula?
Likewise, the expiratory reserve volume is given by: E R V = T L C − I R V − R V − T V ERV = TLC − IRV − RV − TV ERV=TLC−IRV−RV−TV. Your ERV will be higher when you are standing than when you are sitting.