The volume of air left in lungs after maximum expiration is called………while the volume of air breathed out during a normal restful respiration is called………. .

Explanation

To answer the question, we need to identify two specific terms related to lung volumes:

1. **Volume of air left in lungs after maximum expiration**: This is known as **Residual Volume**. Residual volume is the amount of air that remains in the lungs after a person has exhaled as much air as possible. This volume is important because it prevents the lungs from collapsing and ensures that there is always some air available for gas exchange.

2. **Volume of air breathed out during a normal restful respiration**: This is referred to as **Tidal Volume**. Tidal volume is the amount of air that is inhaled or exhaled during a normal, relaxed breath. It typically measures around 500 ml in an adult male and about 400 ml in a healthy female.

So, the complete answer to the question is:
- The volume of air left in lungs after maximum expiration is called **Residual Volume**.
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