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Excretory System

The system in the body that collects wastes produced by cells and removes the wastes from the body.

Excretion

The removal of wastes

Urea

The chemical that comes from the breakdown of proteins

Kidneys

The two major organs of the excretory system, which eliminate urea, excess water, and some other waste materials

Urine

A watery substance produced by the kidneys

Ureters

Two narrow tubes that carry the urine to the urinary bladder

Urinary Bladder

A saclike muscular organ that stores urine

Urethra

The tube where urine exits the body

Nephron

Tiny filtering structures in the kidneys that remove waste from the blood and create urine.

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