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Breathing and Exchange of Gases question

2013 · Q58
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Breathing and Exchange of Gases question

2013 · Q58

NEETBiologyBreathing and Exchange of GasesMCQ+4 / −1
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. NEET 2013 Biology - Breathing and Exchange of Gases Question 23 English
  1. A
    A - Trachea - Long tube supported by complete cartilaginous rings for conducting inspired air.
  2. B
    C - Alveoli - Thin walled vascular bag like structures for exchange of gases.
  3. C
    B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.
  4. D
    D - Lower end of lungs - Diaphragm pulls it down during inspiration.
View written solutionFree

Correct answer: B

In the given figure A is trachea. It is supported by incomplete cartilaginous rings which prevent its collapse during inspiration. B is pleural membrane. It encloses lungs. C is alveoli. They are thin walled sacs having extensive network of capillaries for gaseous exchange. D is diaphragm.

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