write functions of the water vascular system of echinoderms ?
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The main function of the water vascular system is to help in locomotion. Echinoderms having suctorial podia (tube-feet) can adhere to the substratum temporarily. The mechanism of locomotion has discussed in detail under the water vascular system of Asterias and Echinus.
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The water vascular system is a unique and defining characteristic of echinoderms. It is a vital part of the system and exhibits control over the hundreds to thousands of tube feet that live in the ambulacral grooves. Tube feet (podia) participate in locomotion, gas exchange, feeding, attachment, and sensory reception.
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