Animals - Animal types and traits - Octopus anatomy - Cephalopods
How many hearts does an octopus have?
Correct!
Octopuses actually have three hearts. Two branchial hearts pump oxygen-depleted blood through the gills. The third, central heart then supplies the rest of the body with oxygenated blood. These three hearts are among the most unusual features of cephalopods, which have a highly developed circulatory system.
Two hearts serve the gills, while the central heart pumps oxygenated blood through the body.
Source: Smithsonian Ocean
