Derm
The derm is a fabric of the conjunctive type forming with the skin and the hypoderme the Peau. Its thickness is variable according to the body areas but can reach a millimetre.
One usually distinguishes the papillary Derme been next to with the dermo-épidermique junction, the reticular Derme and the deep Derme.
Its conjunctive character comes from its composition:
- Macromolecule S of the type proteinic, in particular fibers of Collagenous, elastin and of Fibronectine conferring on the skin flexibility, elasticity and sitted.
- Mucopolysaccharide S, kind of freezing in which bathe the macromolecules. This " Freezing " is made of Glycosaminoglycane S, proteins which with the manner of a sponge will collect water in the derm and thus will act like reserve of hydration.
- various cells of which the Fibroblast S (cell taking part in the synthesis of the macromolecules) and cells of the immune system (Lymphocyte S, Mastocyte S, tissue Macrophage S).
The derm is irrigated by the Sang (blood system out of candelabrum), the derm deals with the nutrition of the skin by diffusion. Its Fiber S proteinic makes of him a true base for the skin whose ageing is at the origin of the appearance of the wrinkles and other signs of cutaneous ageing.
In addition to its nutritive role, the derm also plays a central role in the Thermorégulation and the Cicatrisation as in L elimination of toxic products (by sweat which contains urea).
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