An octopus has three hearts. Each heart pumps blood to different parts of its body.
The three hearts of an octopus are arranged in a row, with one larger heart in the middle and two smaller hearts on either side. The two smaller hearts pump blood to the gills, while the larger heart pumps blood to the rest of the body. The three hearts work together to ensure that the octopus's organs receive enough oxygenated blood to function.