NEET Biology Breathing And Exchange Of Gases Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Question & Answer Discuss:

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristics.

(a) C-Alveoli-thin walled vascular bag like structures for exchange of gases.

(b) D-Lower end of lungs-diaphragm pulls it down during inspiration

(c) B-pleural membrane surrounds ribs on both sides to provides cushion against rubbing.

(d) A-trachea-long tube supported by complete cartilaginous rings for conducting inspired air.