Renal columns

Definition

Renal columns are extensions of cortical tissue that project into the medulla of the kidney, separating the renal pyramids. They provide a pathway for blood vessels to enter and exit the cortex from the medulla.

Related terms

Renal Cortex: The outer layer of the kidney where filtration occurs, containing nephrons that filter blood and begin urine formation.

Renal Medulla: The innermost part of the kidney composed of renal pyramids and tubules that concentrate urine before it moves to the bladder.

Renal Pyramids: Cone-shaped tissues in the kidney's medulla, involved in urine transport from the nephrons to the calyces