universalwonder
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universalwonderliked a comment in Sea Spiders Use Their Guts, Not Hearts, To Pump Oxygen.
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To keep blood and oxygen flowing throughout their bodies, most animals depend on a beating heart. But researchers have discovered that sea spiders use a strange alternative: they move blood and oxygen throughout most of their bodies by pumping their guts. The sea spiders have an unusual gut in the first place, the researchers say. :)About 7 years ago
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