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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 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.

Text Solution

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The correct Answer is:
B
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