Kidneys - a pair of organs that filter and clean the blood, Nephrons - microscopic filters in the kidneys that remove wastes such as urea from the blood, Urea - waste product that contains nitrogen and is produced when cells use protein for energy, Antidiuretic hormone (ADH) - a hormone that signals the kidneys to take water from the nephrons and return it to the bloodstream so that the kidneys make less urine, Urine - a waste fluid produced by the kidneys that is made up of excess water, salts, glucose, amino acids, and urea, Urinary Bladder - organ where urine is stored, Urethra - a tube through which urine flows from the urinary bladder and out of the body, Urination - the process by which urine exits the body, Ureter - tube that transports urine from kidneys to the urinary bladder,

Urinary system

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