The role of stratum corneum

The stratum corneum is located in the outermost layer of the skin and is the natural barrier of the human body. In addition to its immune function, it is also of great significance to keep skin moist and not dry. The stratum corneum is composed of fifteen to twenty layers of dead skin cells without nuclei outside our muscles.

The stratum corneum plays a great role, mainly on the skin. The stratum corneum can make the skin moist and shiny, absorb external moisture and beneficial substances and protect the skin. However, if the stratum corneum is too thin, it will affect the quality of the skin, desquamate, and the skin will lose moisture and become dull.

The stratum corneum has a good barrier effect on microorganisms. Generally, bacteria with a diameter of 200 nm and viruses with a diameter of 1/2 cannot enter the skin under normal circumstances. Secondly, the weak acidity of the skin surface is not suitable for the reproduction of parasitic bacteria.

In addition, free fatty acids in the lipid membrane on the skin can inhibit the growth of parasitic bacteria, such as long-chain oil saturated fatty acids and oleic acid can inhibit Streptococcus pyogenes, and dry skin and desquamation are not suitable for bacterial reproduction.

The stratum corneum is the surface layer of skin, that is, the layer of dead cells. This is a very thin stratum corneum membrane, about 0.02 mm thick, but it has an important protective effect on the body. We touch the detergent with our bare hands, and the detergent cannot penetrate into our skin. This is because the stratum corneum plays its barrier function. In addition, it can also prevent the water in the body from evaporating outward.

Extended data:

Maintenance of stratum corneum:

The stratum corneum is definitely not just a dead cell, it has many functions. In addition, because the stratum corneum, basal layer and dermis are interactive, once the stratum corneum is in a bad state, the newborn cells will also be in an abnormal state.

In order to keep the stratum corneum in the best condition, the stratum corneum should be kept moist and full of water at any time. In the stratum corneum, the "intercellular lipid" between the natural thermal garden in keratinocytes and keratinocytes will tightly lock water.

The "sebum film" tightly covering the skin surface can prevent water loss. Daily skin care can help the stratum corneum to play a barrier function. As long as the makeup is maintained in the order of lotion, lotion and cream, the stratum corneum can be maintained in the most ideal state.

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