Study guides, Class notes & Summaries

PNR 120 Exam 3 (Answered) Complete Solution Skin functions -protective covering -waterproof due to keratin -barrier to bacteria and other invading organism -protects underlying tissues from thermal, chemical, and mechanical injury -regulates body temp -converts ultraviolet rays to vitamin d -melanin protects tissue from UV light -nerve receptors transmit feelings of heat, cold, pain, touch, and pressure age related changes in skin and structure -decreased elastic fibers -loss of coll...