Question
Distinguish between
(a) IRV and ERV.
(b)Inspiratory and expiratory capacity.
(c) Vital capacity and Total lung capacity.
Solution
(a)
|
IRV |
ERV |
|
1. It is the amount of air inhaled forcibly after normal inspiration. 2. IRV=2500–3000ml |
1. It is the amount of air exhaled forcibly after normal expiration. 2. ERV = 1000 – 1100 ml. |
(b)
|
Inspiratory capacity 1. It is the total volume of air which can be inhaled after normal expiration. 2. I.C. = TV + IRV 3. IC is 3000– 3500 ml. |
Expiratory capacity 1. It is the total volume of air expired after a normal inspiration. 2. EC = TV + ERV 3. EC= 1500- 1600 ml. |
(c)
| Vital capacity | Total lung capacity |
| 1. It is the maximum volume of air a person can breathe in after a forced expiration |
1. Total volume of air accommodated in the lungs after a forced inspiration. |
| 2. VC = ERV + TV+ IRV | 2. Total Lung capacity = VC + RV |
