title: Renal countercurrent mechanisms: structure and function.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D002196:Capillaries; D006025:Glycosaminoglycans / Q000494:pharmacology; D006801:Humans; D007668:Kidney / Q000033:anatomy & histology* / Q000098:blood supply / Q000502:physiology*; D007684:Kidney Tubules / Q000502:physiology; D009995:Osmosis; D051381:Rats; D013046:Specific Gravity; D014556:Urine
chemical_list: D006025:Glycosaminoglycans