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Here is an example in sea stars. Water enters into the body of the sea star though a plate on the top. The water rushes through the body and down each of it's tentacles. The moving water fuels the hydraulic system of its tube feet. Because of the water entering it's body, its muscles can move its feet and allow movement for the whole sea star. The same is true with most echinoderms.
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How do echinoderms use their tube feet?
Echinoderms use their tube feet by using their water vascular system, so their tube feet are basically controlled by a water pressure system. Tube feet are adapted to a different uses in the groups of echinoderms by being able to use their tube feet to attach to objects as well as for protection and the gaining their nutrients.
Do mollusks have tube feet?
No. Echinoderms have a peculiar water-driven tube system that they use for movig around.
What do echinoderms use for movement?
Echinoderms, such as seastars and sea urchins, use their tube feet to move. Tube feet have suction discs which allows the echinoderm to crawl or stick to various surfaces.
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