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Thursday, November 5, 2020
An octopus has three hearts, nine brains, and blue blood. Two hearts pump blood to the gills, while a third circulates it to the rest of the body.
https://oceanservice.noaa.gov/gallery/image.php?siteName=nosimages&cat=Handheld%20Octopus#:~:text=An%20octopus%20has%20three%20hearts,the%20rest%20of%20the%20body.
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