Animals with More than One Heart
Octopus or Squid
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Octopus and Squid have 3 hearts in total, 1 systematic to go along with two 'gill hearts' that force blood to the gills.
Earthworms
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An earthworm has 5 arches or hearts that are segmented and pump blood throughout its body.
Hagfish
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The hagfish has 4 of them, one main 3 chambered systematic heart and 3 accessory pumps.