What is skin made of?
Skin is made of cells arranged in three main layer. The deepest layer, called the dermis, contains living cells, blood vessels and nerve endings that sense pressure, heat, cold and pain. Above this is a thin layer, called the epidermis, that produces new cells all the time. The new cells die as they are slowly pushed towards the surface, where they from a protective outer layer. Then they fall away in small flakes.

Flaking away
The surface of skin, magnified about 200 times, with flakes of dead cells forming.

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