The functions of the skin, the aging and environmental factors.

The skinThe skin is an intelligent organ and is the heaviest and more extended of the human body, its thickness varies from 2 to 8 mm. The skin is divided into three primary layers; the epidermis, the dermis and the hypodermis (subcutaneous adipose tissue). It’s functions The relational-aesthetics: it is certainly the best known and most immediate, really the skin performs less well known functions for the individual’s life. Protective function Barrier function Absorption function Immune function Secretory function Thermoregulatory function Sensory function Synthesis vitamin D function Each of these functions is the direct result of internal work between the three primary layers. Ageing causes Skin ageing is an inevitable biological phenomenon. The time and modalities of ageing skin are mainly influenced by: • genetic inheritance • local factors such as pollution, lifestyle habits, exposure to solar radiation and UVA sunlamps

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