The Blood System

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  • Created by: Uswa
  • Created on: 23-03-13 16:06
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  • The Blood System
    • Heart
      • It is an organ that pumps blood around the body.
      • Much of the wall of the heart is made from muscle tissue
      • It has 4 main chambers.
        • Left & Right atria and ventricles.
    • The process
      • Blood enters ATRIA of heart
        • Atria CONTRACTS and forces blood into VENTRICLES
          • Ventricles CONTRACT and force blood put of heart
            • [VALVES in heart ensure that blood flows in correct direction]
            • Blood flows from heart to organs through ARTERIES and returns through VEINS
    • Arteries
      • Take blood AWAY
      • Have thick walls containing muscle and elastic fibres
      • If they become too narrow, and restrict blood flow
        • STENTS used to keep them open
    • Veins
      • Take blood TO the heart
      • Have thinner walls and often have valves to prevent back-flow of muscles
  • Circulatory system transports substances around the body
    • The Blood System
      • Heart
        • It is an organ that pumps blood around the body.
        • Much of the wall of the heart is made from muscle tissue
        • It has 4 main chambers.
          • Left & Right atria and ventricles.
      • The process
        • Blood enters ATRIA of heart
          • Atria CONTRACTS and forces blood into VENTRICLES
            • Ventricles CONTRACT and force blood put of heart
              • [VALVES in heart ensure that blood flows in correct direction]
              • Blood flows from heart to organs through ARTERIES and returns through VEINS
      • Arteries
        • Take blood AWAY
        • Have thick walls containing muscle and elastic fibres
        • If they become too narrow, and restrict blood flow
          • STENTS used to keep them open
      • Veins
        • Take blood TO the heart
        • Have thinner walls and often have valves to prevent back-flow of muscles
    • There are 2 seperate circulation systems.
      • One for lungs
      • One for other organs of the body
  • Aorta
    • Artery. Carries blood out of left ventricle of heart, to other arteries of the body.
  • Pulmonary Artery
    • Takes blood from the heart to the lungs
  • Vena Cava
    • Brings deoxygenated blood from the body back to the heart
  • Pulmonary Vein
    • Caries oxygenated blood from lungs to heart

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