the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and main function and / or characteristic A. B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbingB. C- Alveoli -Thin walled vascular bag like structures for exchange of gases.C. D- Lower end of lungs -Diaphragm pulls it down during inspiration .D. A -Trachea -Long tube supported by complete cartilaginous rings for conducting inspired air.

the figure shows a diagrammatic view of human respiratory system with

1.	the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and main function and / or characteristic A. B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbingB. C- Alveoli -Thin walled vascular bag like structures for exchange of gases.C. D- Lower end of lungs -Diaphragm pulls it down during inspiration .D. A -Trachea -Long tube supported by complete cartilaginous rings for conducting inspired air.
Answer» Correct Answer - B