The next step up on the renewal scale is to replace an old tub or shower with a fiberglass or plastic insert that includes integrated wall panels. According to Paul Nygren, of Nygren Remodeling, Inc. , in Minneapolis, this type of job costs about $2,000 to $3,000.
After they reach the outermost layer of epidermis, they eventually shed. The fibrous protein i.e. keratin is meant to protect the skin and provides water-proof barrier to the skin. The Melanocytes: These are one of the types of cells in epidermis which produce pigment and give color to the skin.
1 Keratinocytes or squamous cells are in the middle layer of the epidermis and produce keratin, the protein that forms the protective outer layer. Keratin also is used to produce hair and nails.  Melanocytes make melanin, the pigment that provides color to the skin.