The renal lobe is a portion of a kidney consisting of a renal pyramid and the renal cortex above it.
[1] In humans, on average there are 7 to 18 renal lobes.
[medical citation needed] It is visible without a microscope, though it is easier to see in humans than in other animals.
It is composed of many renal lobules, which are not visible without a microscope.
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)