Arrange the various respiratory volume in ascending order .

Options

A. Tidal Volume `rarr` Residual Volume `rarr` Expiratory Reserve Volume `rarr` Inspiratory Reserve Volume
B. Tidal Volume `rarr` Expiratory Reserve Volume `rarr` Residual Volume `rarr` Inspiratory Reserve Volume
C. Tidal Volume `rarr` Residual Volume `rarr` Inspiratory Reserve Volume `rarr` Expiratory Reserve Volume
D. Residual Volume `rarr` Tidal Volume `rarr` Inspiratory Reserve Volume `rarr` Expiratory Reserve Volume

Answer

To arrange the various respiratory volumes in ascending order, we need to first understand what each volume represents and their approximate values:

1. **Tidal Volume (TV)**: This is the amount of air that is inhaled or exhaled during normal breathing. The average value is approximately **500 ml**.

2. **Expiratory Reserve Volume (ERV)**: This is the amount of air that can be forcibly exhaled after the end of a normal expiration. The average value is approximately **800 to 1100 ml**.

3. **Residual Volume (RV)**: This is the volume of air that remains in the lungs after a forceful expiration. The average value is approximately **1100 to 1200 ml**.

4. **Inspiratory Reserve Volume (IRV)**: This is the amount of air that can be inhaled forcefully after a normal inhalation. The average value is approximately **2500 to 3000 ml**.

Now, let's arrange these volumes in ascending order based on their values:

- **Tidal Volume (TV)**: ~500 ml
- **Expiratory Reserve Volume (ERV)**: ~800 to 1100 ml
- **Residual Volume (RV)**: ~1100 to 1200 ml
- **Inspiratory Reserve Volume (IRV)**: ~2500 to 3000 ml

Thus, the ascending order of respiratory volumes is:

**Tidal Volume < Expiratory Reserve Volume < Residual Volume < Inspiratory Reserve Volume**

### Final Arrangement:
1. Tidal Volume (TV) - ~500 ml
2. Expiratory Reserve Volume (ERV) - ~800 to 1100 ml
3. Residual Volume (RV) - ~1100 to 1200 ml
4. Inspiratory Reserve Volume (IRV) - ~2500 to 3000 ml