What is the respiratory organ of the frog?

Gills for tadpoles, lungs for adults.

Gills for tadpoles, lungs for adults.

Adults have lungs, and the skin of the frog can absorb tiny amount of oxygen through their skin. Tadpoles have gills.

The skin.
the answer is the amphibian breathe through their gills, skin, and soon they use their lungs to breathe
Larvae have gills, and adults have lungs.