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Squids
Squids have some of the strangest hearts in the animal kingdom. These cephalopods possess a three-chambered heart that pumps blood to all parts of the body. The heart is located in the head and is divided into three parts: the systemic, branchial, and pulmonary hearts. The systemic heart pumps blood to the gills and the branchial heart pumps oxygenated blood to the organs, while the pulmonary heart pumps deoxygenated blood to the rest of the body. The blood is then circulated through the entire body, providing oxygen and nutrients to the cells and organs.
