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What are the cortex and medulla of a mammalian kidney?
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renal system
Diagram showing the location of the kidneys in the abdominal cavity and their attachment to major arteries and veins.
The mammalian kidney is a compact organ organized into two primary, distinct regions: the outer cortex and the inner medulla.12
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Cortex: This granular-appearing outer section is the site where urine production begins. It contains the renal corpusclesâwhich consist of the glomerulus and Bowmanâs capsuleâas well as the proximal convoluted tubules and distal convoluted tubules of the nephrons.23
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Medulla: This inner, striated region is composed of triangular tissue sections known as renal pyramids. It houses the loops of Henle and the collecting tubules, which transport urine from the cortex toward the renal pelvis for eventual excretion.423