JOTI / SCIENCE PHOTO LIBRARY JOTI / SCIENCE PHOTO LIBRARY
Scar on a 35 year old man's hand. The scar can be seen as a diagonal indented line in the bottom right of the hand. Scars are areas of tissue formed when the body repairs a wound. To heal lesions the body increase the production of collagen, a tough fibrous protein, to form connective tissue over the wound.
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