Explain the character of Enchinoderm.
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Energy expenditure associated with softening and stiffening of echinodermconnective tissue. Catch connective tissue of echinoderms at rest (in the standard state) either stiffens or softens in response to different kinds of stimulation.
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in Greek echinodermata means hedgehog and derma means skin thus are spinny skinned organism they are exclusively free living Marine animals triploblastic and have a ceiling cavity they also have a peculiar what time arrival tube system that they use for moving around they have hard calcium carbonate structure that they used as skeleton
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