Blood & Circulatory System

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  • Blood & Circulatory system
    • Red Blood Cells
      • Small Diameter
      • Relatively thick
      • Large Surface Area to Volume ratio
      • Doughnut shaped
      • No nucleus
    • In the lungs heamoglobin reacts with oxygen to become oxy heamoglobin
    • Platelets
      • Help your blood clot when you cut yourself
        • Prevents bacteria entering the wound
    • Arteries
      • Thick
      • Muscular
      • elastic wall
    • Veins
      • Thinner wall
      • have valves
    • Double circulatory system
      • Right side of the heart to lungs
      • Left side of the heart to the rest of the body
        • Left side of the heart has more muscle
    • Plasma
      • Carries digested food
        • Chlorestrol
        • Hormones
        • Antibodies
        • excess water
        • waste products
        • excess heat
    • Atrium and ventrices
      • Atrium receives from veins
      • Ventricles pump to arteries

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