Which of the following volume is not inclued in vital capacity

Options

A. ERV `+` IRV
B. TV`+` IRV `+` IRV
C. IRV
D. RV

Answer

To solve the question "Which of the following volume is not included in vital capacity," we will break down the concepts and definitions involved step by step.

### Step-by-Step Solution:

1. **Understand Vital Capacity**:
- Vital capacity (VC) is defined as the maximum volume of air that can be exhaled after a maximum inhalation. It is an important measure of lung function.

2. **Components of Vital Capacity**:
- Vital capacity is made up of three main components:
- **Tidal Volume (TV)**: The amount of air inhaled or exhaled during normal breathing.
- **Inspiratory Reserve Volume (IRV)**: The additional amount of air that can be inhaled after a normal inhalation.
- **Expiratory Reserve Volume (ERV)**: The additional amount of air that can be exhaled after a normal exhalation.

3. **Identify the Residual Volume (RV)**:
- **Residual Volume (RV)**: This is the amount of air that remains in the lungs after a forceful exhalation. This volume cannot be voluntarily expelled and is always present in the lungs.

4. **Determine the Answer**:
- Since vital capacity includes TV, IRV, and ERV, but does not include RV, we conclude that the volume not included in vital capacity is the **Residual Volume (RV)**.

### Final Answer:
The volume that is not included in vital capacity is **Residual Volume (RV)**.

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