The renal capsule
is a tough fibrous layer surrounding the kidney
and covered in a thick layer of perinephric adipose tissue
. It provides some protection from trauma and damage.
The renal capsule relates to the other layers in the following order (moving from innermost to outermost):
- renal medulla
- renal cortex
- renal capsule
- perinephric fat (or "perirenal fat")
- renal fascia
- paranephric fat (or "pararenal fat")
- peritoneum (anteriorly), and transversalis fascia (posteriorly).
The periephric fat may be regarded as a part of the renal capsule, called the adipose capsule of kidney
- - "Mammal, kidney cortex (LM, Medium)"