water vascular system

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Noun1.water vascular system - system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration
echinoderm - marine invertebrates with tube feet and five-part radially symmetrical bodies
vascular system - the vessels and tissue that carry or circulate fluids such as blood or lymph or sap through the body of an animal or plant
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References in periodicals archive ?
It also possessed an internal ring, which they interpreted as part of the water vascular system 6 made up of fluid-filled canals used for feeding and movement.
The five-lobed hydrocoel grows around the larval esophagus and fuses with itself to form the ring canal and radial canals of the water vascular system. Pentamerous patterning of other juvenile structures (other coelomic compartments, skeleton, nervous system, etc.) begins after the formation of the early water vascular system.
The red color is due to the presence of hemoglobin containing coelomocytes (RBCs) present in the water vascular system (Christensen 1999).
Together, these structures constitute the water vascular system, an important distinguishing feature of the phylum.
The water vascular system of asteroids serves crucial roles in locomotion, food handling, respiration and, in many species, burrowing.
One of the most distinctive characteristics of echinoderms is their water vascular system - a unique arrangement of fluid-filled coelomic passages and associated parts.