MONICA SCHROEDER / SCIENCE PHOTO LIBRARY MONICA SCHROEDER / SCIENCE PHOTO LIBRARY
An illustration of the pancreas (textured orange strip in distance) and islet of Langerhans (pink). Langerhans' cells are located in all layers of the epidermis but are most easily seen in the prickle cell layer. They recognize antigens and are an important component of the immune system. Ultra-structurally, Langerhans' cells have an irregular clefted nucleus and are devoid of tonofilaments. They have prominent mitochondria, lysosomes and rough endoplasmic reticulum. Also shown are the small intestine (smooth orange tube) and gall bladder (green).
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