Did you know that octopuses have three hearts? Two of the hearts are branchial hearts, which pump blood to the octopus's gills, while the third is a systemic heart that pumps blood to the rest of its body.
Did you know that octopuses have three hearts? Two of the hearts are branchial hearts, which pump blood to the octopus's gills, while the third is a systemic heart that pumps blood to the rest of its body.
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