Sugar 101. Naturally occurring sugars and added sugars. There are two types of sugars in American diets: naturally occurring sugars and added sugars. Naturally occurring sugars are found naturally in foods such as fruit (fructose) and milk (lactose).
Epidermis, in zoology, protective outermost portion of the skin. There are two layers of epidermis, the living basal layer, which is next to the dermis, and the external stratum corneum, or horny layer, which is composed of dead, keratin-filled cells that have migrated outward from the basal layer. The melanocytes, responsible for skin colour, are found in the basal cells.
It is made up of two layers-the epidermal and dermal layers. The epidermal layer is the thinnest of the layers and is made up of its own set of thinner layers. The outermost layer is composed of keratin (a fiber protein) cells. These cells combine with a thin layer of oil to create a water-proof layer.