One of the main functions of frog's skin is
Diffusion of respiratory gases
Absorption of ultraviolet rays to produce vitamin D
Storage of excess food in the form of subcutaneous fat
Excretion of nitrogenous waste in the form of uric acid
Respiratory System in Frogs -
Respiratory System in Frogs
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The skin of frog provides an extensive surface for the exchange of gases (cutaneous respiration).