How much air is left inside the lungs after a maximum forceful expiration in a normal adult person? What technical name is given to this air?

Explanation

To answer the question regarding the amount of air left in the lungs after a maximum forceful expiration in a normal adult person, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to determine how much air remains in the lungs after a person has exhaled as much as possible (maximum forceful expiration).

2. **Identify the Volume of Air**: The volume of air that remains in the lungs after maximum expiration is known as the residual volume.

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