Frog Anatomy

Facts about Frog Species

Frogs breathe through their skin when underwater. Oxygen in the water can pass through their porous skin and go directly to the blood. They also have a pair of lungs that allow them to breathe when on land. They have a highly specalised sense of hearing detecting high-pitched sounds with their ears and low-pitched sounds through their skin.

They also have a highly developed sense of sight and smell enabling them to detect predators. Their sense of smell detects chemical signals that also help them identify a food source.

Frogs have a closed circulatory system containing a three-chambered heart with two atria and one ventricle. A valve within the heart, called the spiral valve which directs the flow of blood to prevent oxygenated and de-oxygenated blood from mixing.