n. "In echinoderms, a system of fluid-filled tubes and chambers that connects with the tube feet. The fluid in the water vascular system is under pressure, giving the tube feet their shape." (Source: Burnie)
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By Laura Klappenbach, About.com Guide
n. "In echinoderms, a system of fluid-filled tubes and chambers that connects with the tube feet. The fluid in the water vascular system is under pressure, giving the tube feet their shape." (Source: Burnie)
Navigate Glossary: Glossary Index > W
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