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Hydronephrosis and hydroureter are shown side by side in this urinary tract model, contrasting a healthy kidney with a swollen one. The normal kidney drains through a thin, straight ureter, while the enlarged kidney shows a dilated pelvis and calyces feeding a wide, tortuous ureter. Both lead into an opened bladder with a visible inner cavity and urethra below. A clear anatomy teaching piece for classrooms, nursing schools and urology patient education.

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