In the adult toad, gascous exchange takes place through ____________
A. Buccal cavity, skin and spiracle B. Buccal cavity, bladder and lungs C. Buccal cavity, skin and lungs D. gills, skin and buccal cavity
Correct Answer: C
Explanation
The high surface - to - volume ratio in the toad permits gas exchange through the body surface. The buccal cavity is lined by a thin membrane that is richly supplied with blood capillaries; gaseous exchange occurs in this cavity between the blood in the capillaries and the inhaled air. For the lungs, gaseous exchange occurs between the inhaled air in the alveoli and the blood in the capillaries lining the alveoli
