Kidney
Microanatomy

Nephrons, the urine-producing functional structures of the kidney, span the cortex and medulla. The initial filtering portion of a nephron is the renal corpuscle, which is located in the cortex. This is followed by a renal tubule that passes from the cortex deep into the medullary pyramids. Part of the renal cortex, a medullary ray is a collection of renal tubules that drain into a single collecting duct.

Renal histology is the study of the microscopic structure of the kidney. The adult human kidney contains at least 26 distinct cell types. Distinct cell types include:
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