How a greenland sharks heart can beat for centuries?

Greenland sharks have very slow hearts that make them live for hundreds of years, like a turtle taking tiny steps instead of rushing.

Imagine you're playing with your favorite toy car, and every time you push it forward, it moves just a little bit. That’s how the heart of a Greenland shark works! It beats really slowly, only about once every 10 minutes, that's like taking one step in a race where everyone else is sprinting.

Because their hearts beat so slowly, they don’t use up energy quickly. That means they can keep going for a very long time, just like how you can play with your toy car all day if it doesn't need much power.

Also, Greenland sharks grow really slowly, about 1 centimeter every year! So even though they might look small now, they could be hundreds of years old. It's like watching a plant grow from a tiny seed into a big tree, just much, much slower.