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Functions of the skin

The skin has numerous functions:

  • physical barrier through the stratum corneum
  • barrier to light through melanocytes
  • immunologic barrier through B and T lymphocytes in addition to Langerhans cells
  • temperature regulation through the blood vessels and eccrine sweat glands found in the dermis
  • sensory receptor by both free nerve endings and more complicated receptors that are corpuscular

Without the sensation of touch, temperature and pain, life would be less interesting and definitely more hazardous. For example, the reason people with leprosy lose fingers and noses is due to decreased sensation.