The Excretory System

The Skin & Sweat Glands

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The Sweat Glands are small areas where sweat is kept until sent up a thin tube, and out of a sweat pore.
Another important organ of excretion is the skin.  24 fl. oz. of water and salt are lost each day by an average person.  Losing excessive/extra water or salt may be because of activeness or sweating heavily.  Sweat glands control perspiring and serve primarily to cool the body.

The loss of a liquid from your body is called perspiration, or sweating.  This liquid, known as sweat, comes from sweat glands.  The body has about million sweat glands, mostly located in the armpits, forehead, hands, and feet.

Sweating helps rid the body of wastes, like salt and excess water.  Sweating helps maintain the body's temperature by carrying heat from the body when sweat evaporates.  Sweat is constantly being excreted, but usually not noticeable because of instant evaporation.  The brain gets messages that tells it to release a certain amount of sweat.  Hot weather, exercise, sickness, excitement, and tension can all result in sweating.