Projections of renal pelvis are called
Calyces are the projections of renal pelvis. Inner to the hilum is a broad funnel-shaped space called renal pelvis.
The cortex extends in between the medullary pyramids as renal columns called Columns of Bertini.
Each kidney has nearly one million complex tubular structures called nephrons, which are the functional units of the kidney.
The medulla is divided into a few conical masses (medullary pyramids) projecting into the calyces.