In water, frogs respire using __________.

Step-by-step solution

Frogs are amphibians that can live both on land and in water. In water, frogs respire through their highly vascularized moist skin. This process is known as cutaneous respiration. The dissolved oxygen in water diffuses through the skin into the blood, and carbon dioxide diffuses out. On land, frogs use their buccal cavity, skin, and lungs for respiration. Answer: skin