write functions of the water vasculs system of echinodrens ?
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The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract.
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Explanation:
It is vital part of water vascular system and exhibits control over the hundred to thousands of tubes feet that live in the ambrelarel grooves
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