#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

No statement uses or specializes water_vascular_system; click here to add one.