CAROL & MIKE WERNER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY CAROL & MIKE WERNER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY
Biomedical illustration of a cross section of human skin illustrating the effects of psoriasis. In this autoimmune disease of the skin, the immune system mistakes skin cells as foreign cells and causes then to speed up their growth cycle.
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