How are the alveoli designed to maximise the exchange of gases?

Explanation

### Step-by-Step Solution:

1. **Introduction to Alveoli**:
- Alveoli are tiny air sacs located in the lungs where the exchange of gases occurs. They are the final destination of the respiratory system where oxygen enters the blood and carbon dioxide is expelled.

2. **Structure of Alveoli**:
- Alveoli are pouch-like structures that are numerous in the lungs, creating a large surface area for gas exchange.

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