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Epidermis

The skin’s most superficial layer, which covers the dermis. It is typically as thick as a sheet of paper, but may be thicker. Alternating epidermal ridges and dermal papillae give it an undulating appearance. It consists of four superimposed cell layers that lie on top of the dermo-epidermal junction: the basal layer, Malpighian layer, granular layer and stratum corneum, the latter coated with hydrolipidic film. While skin is made up of 90% keratinocytes, it also contains melanocytes (cells that determine the colour of the skin) and Langerhans cells. The epidermis is devoid of blood vessels; instead, its cells are nourished by diffusion from the dermis.

Epiderme :  CMP/IllustrationCarree.swf 206x206 + illusFile = _illus_Epiderme.swf

Vue globale

The skin’s most superficial layer, which covers the dermis. It is typically as thick as a sheet of paper, but may be thicker. Alternating epidermal ridges and dermal papillae give it an undulating appearance. It consists of four superimposed cell layers that lie on top of the dermo-epidermal junction: the basal layer, Malpighian layer, granular layer and stratum corneum, the latter coated with hydrolipidic film. While skin is made up of 90% keratinocytes, it also contains melanocytes (cells that determine the colour of the skin) and Langerhans cells. The epidermis is devoid of blood vessels; instead, its cells are nourished by diffusion from the dermis.

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Skin index