Circulatory system

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  • Circulatory system.
    • The heart
    • Helping the Heart
      • Pace maker
        • On outside of chest
        • corrects irregular heartbeat of palpatations
      • Artificial Hearat
        • Temporary measure
        • battery carried outside body
        • Mechanical pump
        • Immunosuppressant drugs
        • Blood clots
      • Stents
        • metal mesh tube inflated by balloon in coronary arteries.
        • Widens arteries that are narrowed by fatty deposits
          • coronary heart disease
    • Blood Groups
      • A
        • Antibodies B
      • B
        • Antibodies A
      • AB
        • Both Antibodies
          • Universal reciever
      • O
        • Neither Antibodies
          • Universal Donar
    • Composition of Blood
      • Plasma
        • other components of blood are suspended in Plasema
        • Transports
          • Carbon dioxide from the organs to the lungs
            • Soluble products of digestion from the small intestine to the other organs
              • Urea from the liver to the kidneys
      • Red Blood cells
        • biconcave disks
          • High surface are to volume ratio for better diffusion.
        • no nucleus
          • Save Space
        • carry haemoglobin
          • haemoglobin combines with oxygen to form oxyhaemoglobin
      • White Blood Cells
        • defend the body against disesae
        • Lymphocytes
        • Phagocytes
      • Platelets
        • fragments of cells
        • help blood to clot.
    • Arteries, Veins and Capilliaries
      • Arteries
        • Thick walls
        • small lumen
      • Veins
        • thinners wallers
        • large lumens
        • valves to stop backflow
      • Capilliaries
        • very thin
        • very narrow
        • in organs

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