This layer is comprised of mature keratinocytes which contain fibrous proteins called keratins. The outermost layer will continuously exfoliate or shed on average every 28 to 30 days. The function of this layer is to prevent the entry of foreign substances as well as retain the body’s fluids.
Located just beneath the stratum corneum, it contains living keratinocytes (squamous cells), which develop and form the stratum corneum. Basal layer: The basal layer is the deepest layer of the epidermal layer, and contains basal cells. These basal cells continually divide, creating new keratinocytes, replacing the mature ones that are exfoliated from the surface of the skin.