DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Skin graft scars. Close-up of post-operative scars on the abdomen of an 18-year-old man, after several skin grafts to treat burns. The most severe burns, known as third degree burns, destroy the full thickness of the skin. Skin grafts are used when the burnt area is too large to be repaired using stitches, or when extensive scarring would occur if the area were left to heal naturally. Repeated grafts are often required. During a graft, a piece of healthy skin is removed from one part of the body and transferred to the burnt area. New cells grow from the graft and cover the burn with fresh skin.
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