The skin consists of three layers: the epidermis, the dermis and the subcutaneous.
 

Skin protects: from cold, heat and the sun's radiation; against pressure, knocks and friction; against the loss of water and warmth, and – thanks to the hydrolipidic layer – it stops micro organisms from penetrating to our internal systems.
 

The epidermis regenerates itself about every 27 days (We actually shed our skin more often than snakes do!). Humans lose 1 g of dead skin every day, adding up to approx. 27 kg in a lifetime.
 

Our skin contains a quarter of the body's water. (Humans are 70 percent water.) That’s why it’s so important to drink enough liquids every day (1.5–2 litres) – otherwise our body and skin “dry out.”