#1: Earthworm Last amongst the animals that have multiple hearts, earthworms don’t actually have a heart. Instead, they have a heart-like system called an aortic arch. This closed circulatory system carries food, waste, and respiratory gases throughout the earthworm’s body.
The earthworm has five pairs of hearts, which would make a total of ten.
1. Octopus/Squid. These similar creatures are both cephalopods and have three hearts in total, one systematic to go along with two “gill hearts” that force blood to the gills.