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Skin

Latin: Integumentum commune
Synonym: integument
German: Haut

1 Definition

The skin is a surface organ that forms the delimitation of the organism against the outside world. It protects the human body against pathological germs, against sunlight, or against dehydration, among others.

2 Histology

Human skin has a total surface of app. 1.8m2, and a thickness of around 1.5-4mm. Its total weight lies between app. 3.5-10kg. If you count the fatty tissue, too, a weight of app. 20kg is possible.

The skin is composed of different layers:

Skin appendages (hair, nails, perspiratory, sebaceous and scent glands), blood vessels, nerve terminals, thermo and touch receptors are embedded into the skin for its protection and for its interaction with the environment.

3 Functions of the skin

The skin has manifold functions. They include:

4 Forms of skin

Macroscopically, you can differentiate between two functionally different forms of skin in the human body:

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