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NEET 2011
Exam
NEET
Year
2011
Subject
Zoology
Chapter
Breathing and Exchange of Gases

NEET 2011 · Zoology · Breathing and Exchange of Gases

The figure given below shows a small part of human lung where...

The figure given below shows a small part of human lung where exchange of gas takes place. In which one of the options given below, the one part A, B C or D is correctly identified along with its function. The figure given below shows a small part of human lung where exchange of gas takes place. In which one of the options

Options

  1. AA - Alveolar cavity - main site of exchange of respiratory gases
  2. BD - Capillary wall - exchange of and takes place here
  3. CB - Red blood cell - transport of mainly
  4. DC - Arterial capillary - passes oxygen to tissues

Correct answer

A. A - Alveolar cavity - main site of exchange of respiratory gases

Step-by-step solution

Alveoli are the primary sites of exchange of gases. The exchange of gases (O2andCO2)\left(\mathrm{O}_2\right. and \left.\mathrm{CO}_2\right) between the alveoli and the blood occurs by simple diffusion.
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