The Epidermis - The Epidermis...

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The Epidermis The epidermis consists of keratinized stratified  squamous epithelium. Four cell types are present: Keratinocytes  produce keratin, a protein  that hardens and waterproofs the skin.  Mature keratinocytes at the skin surface are  dead and filled almost entirely with keratin. Melanocytes  produce melanin, a pigment  that protects cells from ultraviolet radiation.  Melanin from the melanocytes is transferred  to the keratinocytes. Langerhans cells  are phagocytic  macrophages that interact with white blood  cells during an immune response. Merkel cells  occur deep in the epidermis  at the epidermal-dermal boundary. They  form Merkel discs, which, in association  with nerve endings, serve a sensory  function.
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There are several layers making up the epidermis.  “Thick skin,” found on the palms of the hands and  soles of the feet, consists of five layers while “thin 
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The Epidermis - The Epidermis...

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