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How is the circulatory system of the earthworm different from the crayfish? hypothesize as to why these differences exist (hint - consider where each lives)​

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Answer:

Like humans (and unlike most invertebrates) earthworms have a circulatory system with red blood (earthworms also have hemoglobin in their blood). Earthworms don't have arteries and veins like us, but instead a system of vessels that distribute the blood in various directions

Explanation:

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