Amphibians have a three-chambered heart - two atria and one ventricle. The mixing of oxygenated and deoxygenated blood is kept to a minimum due to the timing of the contractions between the atria.

Amphibians like glass frogs become see-through whilst sleeping - and now scientists have discovered how. The creatures hide 90 per cent of their red blood cells in their liver, which is mirror-coated, ...

Amphibians hold a significant place in evolution, representing the transition from aquatic to terrestrial lifestyles. They are crucial for understanding the brain and spinal cord of tetrapods—animals ...