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Protection against
Environmental Influences
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The horny layer forms a barrier
between the body and its surroundings. It prevents the body from drying
out, and protects it from environmental influences.
The horny layer is a closely
intermeshed system of horny cells (corneocytes) and a fat system (lipid
system). The horny cells are connected by desmosomes (protein structures).
As the desmososmes undergo degradation, the horny cells are shed as scales
of skin.
Moreover, the horny
cells are held together by the lipid system, which functions as a cement.
Scientists have studied this fatty structure more closely. The lipid layers
contain a number of main components: fatty acids, cholesterol, triglycerides
and ceramides.
Together with water, these four
main components form the lamellar (layered) gel-like lipid system of the
horny layer.
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Picture
1
Cell division occurs in the innermost layer of the epidermis (stratum
basale). As a result, new cells continuously migrate towards the surface
of the skin and keratinize. |
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Picture 2
The horny layer of the skin is a closely meshed system of horny
cells (corneocytes) and lipid layers.
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Picture 3
The lipid system
between the horny cells serves as a cement and as a skin barrier.
Together with water, its four main components — fatty acids,
triglycerides,ceramides and cholesterol — form the lamellar
liquid crystalline lipid system.
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Literature
and Pictures
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in view of
tomorrow
Research and Development at Henkel |
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