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Summary
The basal cell layer contains cells called melanocytes. Melanocytes produce the skin coloring or pigment known as melanin, which gives skin its tan or brown color and helps protect the deeper layers of the skin from the harmful effects of the sun. Sun exposure causes melanocytes to increase production of melanin in order to protect the skin from damaging ultraviolet rays, producing a suntan. Patches of melanin in the skin cause birthmarks, freckles and age spots. Melanoma develops when melanocytes undergo malignant transformation.
Copyright status
This image is public domain because it was first published by the U.S. National Cancer Institute.
Source
http://training.seer.cancer.gov/melanoma/anatomy/layers.html
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment |
|---|
| current | 23:01, 22 November 2008 |  | 397 × 302 (41 KB) | Ashcraft | |
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