Stephanie Warner ZOO 161 LAB AB Shweta Nayar September 19, 2006 Fun in the Sun? Being out in the sun for long periods of time can have detrimental effects to a person’s life. There are deathly health issues attached to sun exposure. The main one being skin cancer. Ultraviolet radiation of sunlight causes the melanocytes of the skin to increase their production of the pigment melanin. During skin cancer, the genetic material of skin cells is altered by UV radiation, which results in cells growing and dividing uncontrollably, forming a tumor. There are three types of skin cancer. Basal cell carcinoma arises in the layer of rapidly dividing cells in the epidermis and it the most common type of skin cancer. Squamous cell carcinoma arises in the newly formed skin cells as they flatten and move toward the skin surface and is the second most common form of skin cancer. Melanoma is the least common and most dangerous form of skin cancer. It arises in the melanocytes, and unlike basal or squamous cell carcinomas, if left
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Ultraviolet, Squamous cell carcinoma, prolonged sun exposure