#water_vascular_system  system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration
  supertype:  #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
  part of:  #echinoderm  marine invertebrates with tube feet and calcite-covered five-part radially symmetrical bodies

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