Frog is amphibious. It respires through lungs (pulmonary respiration) when it is on land. Buccal respiration is there in frog when it is on land. When it is in water, it respires through skin (cutaneous respiration). The larva of frog, tadpole respires through gills. During development, gills disappear and lungs develop and the tadpole metamorphoses into an adult frog. Hence, frog respires through gills, lungs, buccal cavity and skin in its life cycle.
