Editing Kidneys (section)

== Gross and microscopic anatomy ==

* '''The kidney is divided into cortex and medulla'''
* '''Renal Medulla'''
**More centrally located
**Divided into 8-18 striated renal pyramids
*** The base of the pyramids is positioned at the corticomedually boundary
*** Each renal pyramid terminates centrally in a papilla, and each papilla is cupped by an individual minor calyx
**** '''A group of minor calyces join to form a major calyx. The major calyces combine to form the renal pelvis'''
* '''Renal Cortex'''
**≈1 cm in thickness
**Covers the base of each renal pyramid peripherally
**'''Extends downward between the individual pyramids to form the columns of Bertin'''
* The cells lining the collecting ducts are cubical to columnar and are more resistant to damage than those of the renal tubules.
* The calyces, pelvis, ureters, bladder, and urethra are lined by transitional epithelium/urothelium