A) Alveolar epithelium only.
B) Alveolar epithelium and capillary endothelium.
C) Alveolar epithelium, capillary endothelium and tunica adventitia.
D) Alveolar epithelium, capillary endothelium, a thin layer of tunica media and tunica adventitia.
Correct Answer: B
Solution :
Alveoli are the site of respiratory exchange of gases Oxygen from the alveolar air diffuses through the alveolar epithelium and the capillary endothelium into the capillary blood and carbon dioxide diffuse in the opposite direction. Hence, the correct option is (b).
You need to login to perform this action.
You will be redirected in
3 sec
