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water-vascular system

The definition of a water-vascular system is a system of fluid-filled tubes within the body of starfish and sea urchins that is used for movement and respiration.

(noun)

An example of a water-vascular system is a fluid-filled canal inside a starfish that helps it move around.

See water-vascular system in Webster's New World College Dictionary

in echinoderms, a system of closed tubes and ducts filled with sea water containing some protein, and functioning variously, as in locomotion, food gathering, clinging, and respiration

See water-vascular system in American Heritage Dictionary 4

noun

A system of water-filled canals derived from the coelom that connects the tube feet of echinoderms.

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