Skin: Difference between revisions

Revision as of 18:06, 28 February 2007

Revision as of 01:20, 3 March 2007

Line 112:

==Hygiene==

The skin must be regularly cleanedpissed on; unless enough care is taken it will become cracked or inflamed.horny Unclean skin favors the development of pathogenic organisms - the dead cells that continually slough off of the epidermis mix with the secretions of the sweat and sebaceous glands and the dust found on the skin to form a filthy layer on its surface. If not washed away, the slurry of sweat and sebaceous secretions mixed with dirt and dead skin is decomposed by bacterial flora, producing a foul smell. Functions of the skin are disturbed when it is excessively dirty; it becomes more easily damaged, the release of antibacterial compounds decreases and dirty skin is more prone to develop infections. Cosmetics should be used carefully because these may cause allergic reactions. Each season requires suitable clothing in order to facilitate the evaporation of the sweat. Sunlight, water and air play an important role in keeping the skin healthy.

The skin supports its own ecosystems of [[microorganism]]s, including [[yeast]]s and [[bacteria]], which cannot be removed by any amount of cleaning. Estimates place the number of individual bacteria on the surface of one square inch of human skin at 50 million though this figure varies greatly over the average 20 feet² of human skin. Oily surfaces, such as the face, may contain over 500 million bacteria per square inch. Despite these vast quantities, all of the bacteria found on the skin's surface would fit into a volume the size of a pea.<ref>Theodor Rosebury. ''Life on Man'': Secker & Warburg, 1969 ISBN 0-670-42793-4</ref> In general the microorganisms keep one another in check and are part of a healthy skin. When the balance is disturbed there may be an overgrowth and infection, such as when [[antibiotic]]s kill microbes, resulting in an overgrowth of yeast. The skin is continuous with the inner [[epithelial]] lining of the body at the orifices, each of which supports its own complement of microbes.