The outermost section of the skin is known as the epidermis. The middle portion is known as the dermis, and the lowest portion is known as the hypodermis, or the subcutaneous layer. Now let's begin by discussing the epidermis, the outermost portion of the skin. The epidermis actually consists of four different types of cells. The cells that predominate in our epidermis are the caroteneocides. They make up 95% of the cells found within the epidermis.