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The Epidermis - The Epidermis . ,.Mature Melano

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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.  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 skin” consists of only four layers. Below is a list of 
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