Giraffes have only one heart. However, the giraffe does have a very powerful heart, which helps to pump blood throughout the animal’s long neck and legs.
A giraffe’s heart weighs roughly 25 pounds and measures approximately 2 feet long. Although this may seem large, it is actually quite small compared to similar-sized animals. The muscle walls of a giraffe’s heart have evolved to become extremely thick. Combined with a small radius, this gives the giraffe heart great power.
This small-yet-powerful heart gives the giraffe very high blood pressure due to the need to move the blood around the animal’s large body. However, researchers note that the giraffe has adapted to this pressure and does not suffer any negative effects.