Renal calyx

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Renal calyx
Kidney PioM.png
Illu kidney2.jpg
Frontal section through the kidney
Latin calices renales
Gray's p.1225
Precursor Ureteric bud
MeSH Kidney+calices

The renal calyces are chambers of the kidney through which urine passes. The minor calyces surround the apex of the renal pyramids. Urine formed in the kidney passes through a renal papilla at the apex into the minor calyx; two or three minor calyces converge to form a major calyx, through which urine passes before continuing through the renal pelvis into the ureter.

Peristalsis of the smooth muscle originating in pace-maker cells originating in the walls of the calyces propels urine through the renal pelvis and ureters to the bladder.

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