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 m
Question
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.
D – Lower end of lungs – diaphragm pulls it down during inspiration
B.
A – trachea - long tube supported by complete cartilaginous rings for conducting inspired air
C.
B – pleural membrane - surround ribs on both sides to provide cushion against rubbing
D.
C – Alveoli - thin walled vascular bag like structures for exchange of gases
Correct option is D
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