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If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is
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coelomic fluid
The body cavity of earthworm is true coelom (schizocoel) as it is formed by the division of mesoderm. The coelom is filled with milky, alkaline coelomic fluid, which contains different types of corpuscles. Thus, if alive earthworm is prickled with a needle on its outer surface, the coelomic fluid will come out.
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