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Unformatted text preview: A system of canals filled with fluid. Uses water pumps to help the animal move, eat, breathe, and sense its environment. 1 Kinds of Echinoderms 5 major classes: Sea Stars (starfish) Brittle Stars and Basket Stars Sea Urchins and Sand Dollars Sea Lillies and Feather Stars Sea Cucumbers Brittle and Basket Stars Have long, slim arms Often smaller than sea stars Do not have suckers on their tube feet. Sea Urchins and Sand Dollars round have no arms use tube feet to move Sea urchins eat algae. They chew with special teeth. Sand dollars bury into soft sand. They eat tiny particles of food found there. Sea Lillies and Feather Stars May have from 5 to 200 feathery arms. Stretch and trap small pieces of food. Sea Cucumbers Have no arms. Has soft, leathery body. Has a long, wormlike shape. 2...
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