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Arthropods do have a circulatory system to move oxygen and nutrients through their bodies, but it is an open design, meaning the organs and cells are bathed in circulatory fluid unlike our circulatory system which delivers blood to specific locations. Their internal body cavity is called a hemocoel, the fluid drains into open pores and is pumped by a simple dorsal heart. Their movements also help to move the fluid around. This liquid is called hemolymph and contains water, salts, proteins, carbohydrates and lipids, and an oxygen-carrying molecule.

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11y ago

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