6.2: The Blood System

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  • The Blood System
    • Circulation
      • double cirulation
        • separate for the lungs
          • pulmonary
        • right --> lungs
        • right O2 --> body
      • William Harvey
        • heart = pump
        • arteries + veins
    • arteries
      • narrow lumen
      • thick wall
      • muscle pulse
      • collagen
    • capillaries
      • small daimeter
      • single cell
      • pores
      • flows via hydrostatic pressure
    • veins
      • thin walls
      • valves
      • large lumen
    • tunica
      • intima
      • media
      • adventitia
    • heart
      • ventricles
      • arota
      • atrium
      • vena cava
      • pulmonary
      • tri+bi cuspid valves
      • aortic valve
      • left = thick
    • heat beat
      • myogenic
      • SA node
      • av node = bundle of his = ventricle
      • medulla oblangata
        • low O2, pressure, pH
    • systole
      • A --> V contracts (blood same direction)
        • then ventricle > aorta
      • AV then aortic valve open
    • diastole
      • both relaxed
        • intro A and V
          • AV open; A closed
    • Atherosclerosis
      • plaque
        • blocked
      • diet, age, smoking, genes
  • epinephrine

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