Integumentary system

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Integumentary system

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

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