In the human kidney, a renal papilla extends directly into the_______________?
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Answer: C. Minor calyx
Explanation
Each renal papilla projects directly into a minor calyx to deliver newly formed urine into the collecting system. Anatomical organization dictates that renal pyramids drain their apical tips straight into funnel-shaped minor calyces. Urine flows from the papillary ducts across the area cribrosa directly into the awaiting minor calyx lumen. The renal medulla contains multiple conical structures called renal pyramids, each terminating in a pointed renal papilla. Minor calyces converge to form major calyces, which subsequently merge to create the large renal pelvis. Microscopic collecting ducts concentrate urine before it emerges from the papillary tips into the urinary tract.
The ureter is located much further down the urinary tract, receiving urine from the expanded renal pelvis. Major calyces are formed by the convergence of several minor calyces rather than receiving papillae directly. The renal pyramid is the broader parenchymal structure containing the papilla at its apex rather than the receiving chamber.
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