Which worm has five pairs of hearts?

Earthworms play an important role in many ecosystems, breaking down rotting organic matter into its simple components for use by plants. read more

Earthworms can have five, 10 or zero hearts, depending on how you define "heart." They have five pairs of aortic arches that run along the length of its body (or 10 single arches, if you count each pair as two separate structures). read more

A worm has FIVE HEARTS! It is the only organism on earth that has 5 hearts. Another cool thing is that worms also have two brains.five1 but if you cut a earth worm perfectly in half it will regenerate the missing organs it actually has 5 hearts. read more

The aortic arches in an earthworm function like the valves in a human heart. An earthworm has five pairs of aortic arches that pump blood into the dorsal and ventricle blood vessels throughout the worm’s body. read more