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7 March, 18:36

Do Earthworms have an opened or closed circulatory system? Why?

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  1. 7 March, 18:51
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    In open systems, hemolymph is not contained in vessels and instead surrounds tissues and organs. In an earthworm's circulatory system, blood is contained within vessels (dorsal, ventral, and lateral), which categorizes it as a closed system.
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