Renal lobe (not labeled) consists of a pyramid
(item #1) and cortex immediately above it.
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)
- Histology image: 15901loa – Histology Learning System at Boston University