Breathing and Exchange of Gases Question 23
23. The figure given below shows a small part of human lung where exchange of gases 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?
Options :
(a) C : arterial capillary - passes oxygen to tissues
(b) A : alveolar cavity main site of exchange of respiratory gases
(c) D : capillary wall exchange of
(d) B : red blood cell - transport of
Show Answer
Answer : b
Hints & Solution
(b) In the given figure the exchange of respiratory gases occurs in alveolar cavity.
The thickness of the alveolar-capillary barrier varies from 0.2 to
