Blood vessels 2

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  • BLOOD VESSELS
    • Veins
      • Features
        • Valves
          • Stops backflow
        • Large lumen
        • Thin walls/less muscle
        • Low in oxygen
          • Except Pulmonary vein
        • Low pressure blood
      • Carries blood to the heart
    • Arteries
      • Carry blood away from the heart
      • Features
        • High blood pressure
        • No valves
        • Thick walls/ muscle
        • Rich in oxygen
          • Except pulmonary artery
        • Narrow lumen
          • To keep blood under pressure
    • Capillaries
      • Connects veins to arteries
      • Features
        • 1 cell thick
        • Permeable
        • Tiny lumen

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