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A triploblastic organism which has an internal, fluid-filled body cavity which originated from the mesoderm during embryonic development. This cavity surrounds the gut, may contain various other organs, and is called a coelom. It differs from the pseudocoels of the pseudocoelomates because it is not derived from the blastocoel. The term is used to classify multicellular animals by developmental pattern.

Selected coelomate links:

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