Imitating Dart Frog - Dendrobates imitator "Tarapoto"
Young Tadpole heartbeat 1/2
Amphibians have a 3 chambered heart (mammals and reptiles have 4 chambers, fish have 2). Here you can see the "pump" action as the blood leaves the heart for the rest of the body. In the last photo you can see blood pooled in the main chamber of the heart, the ventricle.
