A frog has two kidneys. These are located near the spine and are responsible for filtering waste from the blood, much like in many other animals.
The kidneys in frogs play a crucial role in maintaining the balance of fluids and electrolytes in their bodies, especially since frogs have a unique way of absorbing water through their skin. The kidneys help excrete excess water and conserve it in times of need. This adaptation is essential for their survival in various environments, both aquatic and terrestrial.