TAN ⠀ In previous posts we have learned that the top skin layer consists of 5 "floors" and the 1st is occupied by newborn cells and their mums. ⠀ But it also have guards who`s job is to protect skin from Sun: as soon as we get out in the sunshine guards become active and in order to protect skin they start throwing black umbrellas up to the surface (see the carousel). ⠀ Due to a large amount of umbrellas being released, our skin shade becomes darker (tan). ⠀ However places, which are covered in clothing do not chage in colour: if there is no sun and danger, guards are asleep and do not release a single umbrella. ⠀ If we spend too much time under direct Sun without protection, some guards may go crazy and start throwing enormous amounts of black umbrellas. Due to a high concentration of umbrellas in this spot- pigmentation may appear. ⠀ CAST: Guards: melanocytes; Umbrellas: pigment melanin; 5 floor building: Epidermis (top skin layer); 1st floor of Epidermis: basal layer; Inhabitants of the 1st floor: keratinocytes.