Blood Vessels

  • Created by: NWILKA1
  • Created on: 25-05-14 19:46
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  • Blood Vessels
    • Arteries
      • Where blood flows out of the heart under high pressure.
      • Have thick walls made of muscle and elastic tissue.
        • Elastic tissue allows the artery to expand when blood is forced through it.
    • Veins
      • Have much thinner walls than arteries as the blood flowing through them is at a much lower pressure.
      • Have valves to prevent back-flow in long veins (leg)
    • Capillaries
      • The smallest blood vessels.
      • Where substances pass in and out of the blood.
      • Have very thin walls (one cell thick) to allow substances to pass in and out easily.




very good



Thank you :)

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