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Integumentary system

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Transcript

  • 1. The Integumentary System
  • 2. Integument
    • by definition, a tough outer protective layer
    • in humans, the layer is called skin
  • 3.  
  • 4. Parts of the skin
    • epidermis
    • dermis
  • 5. Epidermis
    • Two proteins
      • Keratin, responsible for the toughness
      • Melanin, responsible for the pigment
  • 6. Dermis
    • Contains nerve endings
    • Has capillaries
  • 7. Main function of human integument
    • prevents water loss
  • 8. Other functions
    • Release of metabolic wastes
    • Has waterproofing
    • Protection against solar radiation
    • Antibacterial action
    • Response to stimuli
    • Controls body temperature
  • 9.  
  • 10. Other Parts of the Skin
    • Sweat glands
    • Sebaceous glands
    • Sensory receptors
    • Arrector pili muscle
    • Hair follicle
      • Hair and nails
  • 11.  
  • 12. What causes acne?
    • The pores of the skin become clogged
    • Sebum is stopped on the hair follicle
    • Bacteria infects the site and causes the redness (inflammatory response)
  • 13. Burns
    • 1 st degree
    • 2 nd degree
    • 3 rd degree
  • 14.  
  • 15.