A cortical lobule (or renal lobule) is a part of a renal lobe.
It consists of the nephrons grouped around a single medullary ray, and draining into a single collecting duct.
Its near identical parallel is the rectal lobe[citation needed], which is present in the majority of mammals.
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
This article related to the genitourinary system is a stub.