The Human Excretory System
The word excretion means to remove. The human excretory system removes waste from the body. Many organs are part of the excretory system, including the kidneys, sweat glands, lungs and rectum. The primary organs that remove waste are the kidneys. Excretion is vital to human health because waste is poison. If waste builds up and is not removed, it can cause serious problems. Carbon dioxide and water vapor are removed by the lungs. Other waste, like urea, uric acid, salts and other waste, is removed by the kidneys and sweat glands.
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