The Heart And Blood Vessels

The Heart And Blood Vessels

1. Open/closed circulatory system

2. Blood Vessels

   • Arteries
     • Arterioles
   • Veins
     • Venules
   • Capillaries

3. LORD

4. Blood pressure

5. Double circulation

6. Pacemaker

   • SA / sino-atrial node electrical impulses pulse (pressure wave) AV node ECG (electrocardiogram)

7. Stages

   • Systole - contraction
     • approx 0.4 seconds Atrial systole Ventricular systole
   • Diastole - relaxation
     • approx. 0.4 seconds

8. Smoking, exercise, diet

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