Sunlight and aging of the skin.
D000375:Aging; D003238:Connective Tissue / Q000528:radiation effects; D006801:Humans; D007633:Keratins; D008544:Melanocytes / Q000528:radiation effects; D012867:Skin / Q000033:anatomy & histology / Q000166:cytology / Q000528:radiation effects; D012871:Skin Diseases / Q000209:etiology / Q000517:prevention & control; D012879:Skin Physiological Phenomena; D013472:Sunlight; D013997:Time Factors; D014466:Ultraviolet Rays / Q000009:adverse effects
D007633:Keratins