Question

Cutaneous respiration in a frog

Answer 1

Cutaneous respiration is a form of respiration in which gas exchange occurs across the skin rather than the lungs or gills. They occur in many organisms like insects, amphibians, fish, sea snakes, turtles and few mammals too. The skin of such organisms is very special that they are used for breathing. In order to breathe through the skin, it has to be moist for oxygen and carbon dioxide to pass through.

Answer 2

Answer:

• The skin of frog provides an extensive surface for exchange of gases.

• It is thin richly supplied with blood and kept moist by the mucus and water. The cutaneous respiration is always carried out.

• It is practically the only mode of respiration when the frog is under water.

• Dissolved oxygen in the water is exchanged through the moist surface of the skin by diffusion.