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Integumentary The Integumentary System

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Integumentary The Integumentary System Powered By Docstoc
					      The
Integumentary
    System
The Integumentary System
            • Your skin is the
              largest organ
              of your body.
            • Skin is made up
              of 3 layers of
              tissue
     The Integumentary System
• 1. Epidermis – the outer,
  thinnest layer
• a. The outermost cells of
  your skin are dead and
  rub off when you touch
  anything
• b. New cells are
  constantly produced at
  the base of the epidermis.
• c. Cells produce melanin,
  which is a pigment that
  protects your skin and
  gives it color.
The Integumentary System
            • 2. Dermis – the
              middle layer
            • a. The dermis is
              thicker than the
              epidermis
            • b. The dermis
              contains blood
              vessels, nerves,
              muscles, oil, sweat
              glands, and other
              structures.
The Integumentary System
 • 3. Fatty layer - insulates the
                body
    The Integumentary System
• Skin has many
  functions.
• 1. Protection – forms
  a protective covering
  over the body that
  prevents injury
• a. Many disease-
  causing organisms
  cannot pass through
  the skin.
• b. Prevents excess
  water loss
The Integumentary System
          • 2. Sensory response –
            nerve cells in the skin
            detect and relay
            information to the
            brain
          • 3. Formation of vitamin
            D, which helps your
            body absorb calcium
    The Integumentary System
• 4. Regulation of
  body temperature
• a. Blood vessels
  help release or hold
  heat
• b. Perspiration from
  sweat glands
  eliminates excess
  heat that has been
  produced by muscle
  contractions
The Integumentary System
• 5. Elimination of waste through
           sweat glands
   The Integumentary System
• 6. When injured,
  the skin produces
  new cells and
  repairs tears.
• a. Bruises happen
  when tiny blood
  vessels beneath the
  skin burst and leak
  into surrounding
  tissues.
The Integumentary System
            • 7. When you have a
              cut, a scab forms to
              prevent bacteria
              from entering your
              body.
            • a. Cells in the
              surrounding blood
              vessels fight
              infection
            • b. Skin cells beneath
              the scab grow to fill
              in the gap of the torn
              skin
      The Integumentary System
• 8. Doctors are able
  to repair severe skin
  damage
• a. Skin grafts are
  pieces of skin that
  are cut from one part
  of a person’s body
  and moved to
  replace the skin in
  the injured area
   The Integumentary System
• Taking care of
  our skin:
  –Eat properly
  –Drink plenty of
    water
  –Limit sun
    exposure
  –Keep skin
    clean
  The Integumentary System
• Doctors are beginning to
  grow large sheets of
  epidermis from small pieces
  of the victim’s healthy skin.
• In the United Kingdom,
  doctors are performing
  clinical studies to test
  whether spray on skin cells
  effectively treat burns. This
  treatment is thought to
  reduce scarring and speed
  up the healing process.
      Discussion Question
• What are the dangers to your body
  when your skin is damaged?

				
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posted:11/1/2011
language:English
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