The outer layers of skin are known as the EPIDERMIS, which is composed of nine letters. The EPIDERMIS is the outermost layer of the skin and is made up of several layers of cells that provide a protective barrier against environmental factors such as bacteria, viruses, and other foreign substances. It also helps to regulate body temperature and prevent water loss. The EPIDERMIS is constantly renewing itself by shedding old cells and replacing them with new ones.