The volume of air involves in breathing movements can be estimated by:-

Answer

To estimate the volume of air involved in breathing movements, we can follow these steps:

1. **Identify the Instrument**: The first step is to recognize the instrument used for measuring the volume of air during breathing. The instrument used for this purpose is called a spirometer.

2. **Understanding Spirometry**: Next, we need to understand what spirometry is. Spirometry is the process of measuring and recording the changes in the volume and movement of air in and out of the lungs.

3. **Function of the Spirometer**: The spirometer functions by capturing the amount of air inhaled and exhaled during breathing. It provides quantitative data on various lung volumes and capacities.

4. **Types of Measurements**: The spirometer can measure different volumes of air such as tidal volume (the amount of air inhaled or exhaled in a normal breath), vital capacity (the maximum amount of air a person can expel from the lungs after a maximum inhalation), and other lung volumes.

5. **Conclusion**: Therefore, the volume of air involved in breathing movements can be estimated using a spirometer, and the process of measuring this volume is referred to as spirometry.