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The renal pelvis: machinery that concentrates urine in the papilla Dwyer TM; Schmidt-Nielsen BNews Physiol Sci 2003[Feb]; 18 (ä): 1-6Two decades ago, Bodil Schmidt-Nielsen and Bruce Graves documented the rhythmic contractions of the renal pelvis in a remarkable video, visually demonstrating how peristaltic waves empty the papilla and how the subsequent elastic recoil draws water from the collecting duct and into the tethered-open ascending vasa recta. Thus a periodic hydrostatic gradient generates an axial osmotic gradient. This review recapitulates the video and offers a link to figures and scenes digitized from the original tape.|Humans[MESH]|Kidney Concentrating Ability/*physiology[MESH]|Kidney Medulla/*anatomy & histology/*physiology[MESH]|Kidney Pelvis/*anatomy & histology/*physiology[MESH] |
