Why Crocodiles Have an Extra Hole in their Heart

The video explores the unique anatomy of crocodile hearts, focusing on an extra valve that differentiates them from human hearts. This valve allows crocodiles to redirect blood flow under certain conditions, such as low adrenaline levels or during calm periods. Scientists are still investigating its purpose, with theories suggesting roles in diving, digestion, or simply being a non-harmful evolutionary trait. Despite the lack of conclusive evidence, the discovery of this valve is intriguing and highlights the complexity of crocodile physiology.

What is the main difference between human hearts and crocodile hearts regarding blood circulation?

Under what conditions do crocodiles utilize the extra valve in their hearts?

What are some theories regarding the evolutionary purpose of the extra valve in crocodiles?

What role does the extra valve play in the crocodile's ability to dive?

How might the extra heart valve assist crocodiles during digestion?