Answer:
The answer is E: A, B And C are correct.
Explanation:
The external respiration is that which occurs at the level of the pulmonary alveoli with the capillaries of the pulmonary vessels, producing an exchange of gases, releasing carbon dioxide from the blood to the alveolus, and in turn, this delivers oxygen.
The internal respiration is the one between the tissue capillaries and the cells where the blood releases the oxygen and receives the CO2, turning the oxygenated blood into deoxygenated.
The pulmonary ventilation on the other hand takes oxygen from the air we breathe and takes it to the lungs.
