Which condition is characterized by the destruction of alveolar walls, reducing the respiratory surface area?
Emphysema is a chronic disorder that damages the alveolar walls, reducing the surface area for gas exchange. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.