why is surface area for exchange of gases decreased during Emphysema ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Emphysema**: Emphysema is a chronic respiratory disease that primarily affects the lungs. It is characterized by damage to the alveoli, which are the tiny air sacs in the lungs responsible for gas exchange.

2. **Role of Alveoli**: The alveoli are crucial for the exchange of gases (oxygen and carbon dioxide) between the lungs and the bloodstream. They provide a large surface area that facilitates this exchange.

3. **Damage to Alveoli**: In emphysema, the walls of the alveoli become damaged and lose their elasticity. This damage can lead to the destruction of alveolar walls, resulting in fewer and larger air sacs instead of many small ones.

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