Which of the following statements could be applied to “external respiration”? A. Exchange of gases between alveolar air and the blood in pulmonary capillaries. B. Exchange of dissolved gases between blood in tissue capillaries and the body tissues. C. The production of CO 2 from organic molecules in the cells by using O 2 . D. The inhalation of atmospheric air into the lungs followed by exhalation.
Option A. External respiration:- Exchange of gases between alveolar air and the blood in pulmonary capillaries.
