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Coelenterates, now more commonly referred to as cnidarians, are named for their unique body structure, which features a central cavity called the coelenteron. This cavity is used for digestion and circulation of nutrients. The term "coelenterate" derives from the Greek words "koilos," meaning hollow, and "entera," meaning intestines, reflecting their characteristic body plan. Cnidarians include organisms such as jellyfish, corals, and sea anemones, all of which possess specialized cells called cnidocytes for capturing prey.

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AnswerBot

5mo ago

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