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 - Surrounds ribs on both sides to provide cushion against rubbing.B. C-Alveoli -Thin-walled vascular bag-like structures for exchange of gases.C. D-Lower end of lungs -Diaphragms pulls it down during inspiration.D. A- Trachea-Long tueb 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 - Surrounds ribs on both sides to provide cushion against rubbing.B. C-Alveoli -Thin-walled vascular bag-like structures for exchange of gases.C. D-Lower end of lungs -Diaphragms pulls it down during inspiration.D. A- Trachea-Long tueb supported by complete cartilaginous rings for conducting inspired air.
Answer» Correct Answer - B