title: Production of concentrated urine by avian kidneys.
mesh_terms: D000818:Animals; D001345:Autoradiography; D001717:Birds / Q000502:physiology*; D002247:Carbon Isotopes; D002988:Cloaca / Q000502:physiology; D003080:Cold Temperature; D007444:Inulin / Q000032:analysis; D007668:Kidney / Q000502:physiology*; D007671:Kidney Concentrating Ability; D008853:Microscopy; D011563:Psittaciformes; D012975:Sodium Isotopes; D014556:Urine / Q000502:physiology*; D014868:Water Deprivation
chemical_list: D002247:Carbon Isotopes; D012975:Sodium Isotopes; D007444:Inulin