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Renal pelvis
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the central collecting region of the kidney where urine from the renal calyces is gathered before it travels to the ureter
What is "renal pelvis"?
The renal pelvis is an expanded part of the kidney's collecting system, serving as a reservoir for urine before it flows into the ureter. It is located at the center of the kidney and receives urine from the renal calyces, which are small cup-like structures that collect urine from the kidney's filtration units called nephrons. The renal pelvis acts as a conduit, facilitating the smooth flow of urine from the kidneys to the ureter, ultimately leading to its elimination from the body.