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
Anatomical terminology

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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