An octopus has three hearts.
Two send blood to the gills to pick up oxygen. The third pumps that oxygenated blood around the rest of the body.
Explore the source at NOAA ↗Source checked November 10, 2026.
Nature · A LITTLE WONDER
An octopus has three hearts.
Two send blood to the gills to pick up oxygen. The third pumps that oxygenated blood around the rest of the body.
Explore the source at NOAA ↗Source checked November 10, 2026.