water-vascular systemwa·ter-vas·cu·lar 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.
An example of a water-vascular system is a fluid-filled canal inside a starfish that helps it move around.
in echinoderms, a system of closed tubes and ducts filled with seawater containing some protein, and functioning variously, as in locomotion, food gathering, clinging, and respiration
A system of water-filled canals derived from the coelom that connects the tube feet of echinoderms.