The aortic arches (hearts) help pump blood around the body of the earthworm in a similar way to animals that have only one multi-chambered heart. Worm "hearts" don't have chambers. Worms also don't have lungs. They absorb oxygen through their skin and then it gets into their blood vessels. The dorsal blood vessel does a bit of the pumping work, with the hearts helping to keep blood pressure steady.
That's alot isn't it
(O_o)
They have 5 hearts. =)
The function of an earthworm's nephridium is to excrete wastes from the earthworm's body.
I think the animal that has 4 hearts is a earthworm, because in my science class i dissected a earthworm, i saw 4 different parts of tiny black hearts as my teacher said they were, so yes i am learning in 7th grade but i did learn a lot about the earthworm including the hearts. so that proves that the animal that has 4 hearts is.... the earthworms.
5
through aortic arches that function as many small hearts
dom't no stupid
5
Earthworm.
The earthworm has five pairs of hearts, which would make a total of ten.
it acts as a heart for an earthworm.... <3
the brain is essential for the movement of the earthworm. If the brain of the earthworm is removed, the earthworm will move continuously without stop
Earthworm