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Octopuses have three hearts.
Two pump blood to the gills while one pumps blood to the rest of the body. The main heart even stops beating while they swim.
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AnimalsTwo of them pump blood to the gills, while the third circulates it to the rest of the body. Curiously, the main heart stops beating whenever the octopus swims — which is exactly why they often prefer to crawl.
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Octopuses have three hearts.
Two pump blood to the gills while one pumps blood to the rest of the body. The main heart even stops beating while they swim.
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