Most of us consider human skin as just a tunic, but it is actually much more than a simple wrapper. It shields and protects, controls temperature and water content of the body, manufactures some very important vitamins and conveys sensation whether the coffee cup is too hot or the handshake too cold. Most of the complex structures of the skin, like the pain receptors, the nerve endings, and the sweat gland complexes are located deep inside a layer called the ‘dermis’. The dermis is protected by a covering called the ‘epidermis’, a fast growing layer, the top of which flakes off continuously, acting as a bumper to the dermis. It takes the brunt of most daily-life traumas, like rubbing, scratching and bruising. Normally nothing gets past the epidermis, excepting a bullet wound in the war-field, a knife attack from a backstreet assassin or the more common injection prick from the nurse.
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