Countercurrent transport in the kidney.
D000818:Animals; D001834:Body Water / Q000378:metabolism; D002463:Cell Membrane Permeability; D003201:Computers; D003377:Countercurrent Distribution; D007668:Kidney / Q000098:blood supply / Q000502:physiology*; D007671:Kidney Concentrating Ability; D007679:Kidney Medulla / Q000502:physiology; D007684:Kidney Tubules / Q000502:physiology; D008138:Loop of Henle / Q000502:physiology; D008833:Microcirculation; D008954:Models, Biological; D013816:Thermodynamics; D014508:Urea / Q000378:metabolism
D014508:Urea