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1-2-5.Cross section of skin：Stratum corneum |
●Stratum corneum is a layer where flat corneum cell comes in succession from 15 in 30 layers. It is also on a skin thin as for a thick skin. The horny layer under the more it goes on, the more becomes weak stick, can be done the space, is settled to intercellular to some degree, and peels off like the seat though has stuck mutually the cell.
●There are an intercellular lipid and moisture between corneum cell that comes in succession, and the adhesive of corneum cell works. From among corneum cell, there is "NMF(natural moisture factor)" made of the amino acid and the lactic acid, and the moisture of stratum corneum is kept.
●Stratum corneum is dry. It is covered with the secretion of the glandulae
sebaceae and the sweat gland attached to the skin on the surface of stratum
corneum, and it carries out the function of the barrier.
●It will take about 14 days by the time basale cell that is divided from stratum basale becomes corneum cell. It stays in addition in stratum corneum for about 14 days, it will peel off before long, and it falls usually. The depths of the epidermal are protected by this strong stratum corneum. |
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