Octopuses have three hearts, blue blood, and nine brains

Did you know an octopus has three hearts?

Imagine you're swimming in the ocean and suddenly feel a strong pull on your arm. You struggle to free yourself...

An octopus's third heart pumps blood to its gills, helping it breathe underwater. This unique circulatory system allows it to survive in diverse ocean habitats.

Example

The octopus's third heart (aortic heart) pumps oxygen-rich blood to its gills for respiration.

Remember this

An octopus's third heart is essential for its survival in various ocean environments.

Text adapted from Wikipedia, licensed under CC BY-SA 4.0.

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