renal artery - Carries oxygenated blood (containing urea and salts) to the kidney), renal vein - Carries deoxygenated blood (that has had urea and excess salts removed) away from the kidneys, kidney - Regulates water content of blood and filters blood, ureter - Carries urine from kidneys to bladder, bladder - Stores urine (temporarily), urethra - Releases urine outside the body,

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