multiple hearts

What Animal Has 7 Hearts?

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What Animal Has 7 Hearts? Octopuses or octopi (both are technically correct) are one of the most well-known animals with multiple hearts. Which animal has 16 hearts? Squids have three hearts; one main heart and two branchial hearts. Octopuses and squid have three hearts. Earthworms have five hearts. Scientists are studying cockroach and hagfish hearts

Are Fish The Only Ones With Two Chambered Hearts?

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Are Fish The Only Ones With Two Chambered Hearts? Fish have a two-chambered heart with unidirectional circulation. Amphibians have a three-chambered heart, which has some mixing of the blood, and they have double circulation. Does any animal have a 2 chambered heart? Bird and mammal hearts have four chambers (two atria and two ventricles). A