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Echinoderms (Body Structure (Young larvae show bilateral symmetry, Adults…
Echinoderms (Body Structure, Feeding and digestion, Charactarestics, Movement, Respiration , Reproduction, AlJohara AlSwaidan, AlJohara AlRabiah & Basma Akeel12A, Circulation: No circulatory system, instead they depend on the water-vascular system and the coulomb to transport materials, Response to stimuli: they have a nerve ring that coordinates the moment of thousands of tube-feet and many more functions, Excretion: excretion of metabolic waste, elimination of waste through the anus)