Which of the choices below is not a functional process performed by the respiratory system?

a. pulmonary ventilation

b. transport of respiratory gases

c. external respiration

d. pulmonary respiration?

The respiratory system, as indicated in its name carries out the processes of respiration.

The processes of the transport of the respiratory gases are carried out by the circulatory system, a network of arteries, veins and capillaries, and NOT by the respiratory system (the lungs).