What Animal Has Three Hearts?

Answer

The octopus has one of the most developed circulatory systems of animals outside the vertebrates. The octopus has three hearts. It uses two of the three hearts to pump blood through the gills. The oxygenated blood from the gills then goes back to the third heart to be pumped through the rest of the body.
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What animal has three hearts?
Cow
Whale
Octopus
Earthworm
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The octopus is an animal that has 3 functioning hearts. One of these hearts is responsible for pumping blood through the body, while they other two work by pumping blood through the gills.
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