Write down the route adopted by the foul air , while moving out of the lungs in the atmosphere.

Explanation

### Step-by-Step Solution:

1. **Understanding the Process of Respiration**:
- Respiration involves the exchange of gases in the lungs. Oxygen is taken in, and carbon dioxide (referred to as "foul air") is expelled.

2. **Starting Point - Alveoli**:
- The process of exhaling foul air begins in the **alveoli**, which are tiny air sacs in the lungs where gas exchange occurs.

...