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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 funciton and / ro characteristic

A

C-Alveoli - thin walled vascular bag like structures for exchange of gas- es.

B

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

C

A- trachea -long tube supported by complete cartilaginous rings for con- ducting inspired air.

D

B-pleural membrane -surround ribs on both sides to provide cushion against rubbing.

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TRUEMAN BIOLOGY-NEET - 2013 (HUMAN SYSTEMS)-MCQs
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