title: Maintenance of fluid volume in the starfish water vascular system.
mesh_terms: D000818:Animals; D001692:Biological Transport; D009994:Osmolar Concentration; D011188:Potassium / Q000378:metabolism; D013215:Starfish / Q000378:metabolism / Q000502:physiology*; D014882:Water-Electrolyte Balance
chemical_list: D011188:Potassium