A video showing the layers of the skin and also the process of cell renewal/regeneration/differentiation/keratinization where the keratinocytes formed in the basal layer move upward through the epidermis and become flattened and converted to dead cells called corneocytes. The cell renewal cycle usually takes about 28 days and increases to longer days as we grow older. 28 days meaning for the new cells to undergo differentiation and reach the bottom of the starum corneum. The stratum corneum is replaced every 14 days, 14 days to worn away and 14 days for the dead cells to move from the bottom of the stratum corneum to the top of the surface.
