Notes: Blood Pressure (pg 8)
Notes: Blood Pressure• Systole = Ventricles contracting• Diastole = Ventricles relaxed
Blood Pressure• If your blood vessels were completely rigid  then blood pressure would spike very high  during systole and...
Blood Pressure• If your blood vessels were completely rigid  then blood pressure would spike very high  during systole and...
Blood Pressure• If your blood vessels were completely rigid  then blood pressure would spike very high  during systole and...
Blood Pressure• If your blood vessels were completely rigid  then blood pressure would spike very high  during systole and...
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Blood Pressure Reading• Two numbers (Example: 120 / 80)• Higher number = Systolic. Pressure when  ventricles are contracti...
Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)
Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume
Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume3. Resistance (vasoconstric...
Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume3. Resistance (vasoconstric...
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Blood pressure

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Blood pressure

  1. 1. Notes: Blood Pressure (pg 8)
  2. 2. Notes: Blood Pressure• Systole = Ventricles contracting• Diastole = Ventricles relaxed
  3. 3. Blood Pressure• If your blood vessels were completely rigid then blood pressure would spike very high during systole and drop to zero during diastole
  4. 4. Blood Pressure• If your blood vessels were completely rigid then blood pressure would spike very high during systole and drop to zero during diastole• Luckily, our vessels are elastic
  5. 5. Blood Pressure• If your blood vessels were completely rigid then blood pressure would spike very high during systole and drop to zero during diastole• Luckily, our vessels are elastic• During Systole: vessels stretch (widen), absorbing some of the pumping force. BP is high, but not nearly as high as it would be with rigid vessels
  6. 6. Blood Pressure• If your blood vessels were completely rigid then blood pressure would spike very high during systole and drop to zero during diastole• Luckily, our vessels are elastic• During Systole: vessels stretch (widen), absorbing some of the pumping force. BP is high, but not nearly as high as it would be with rigid vessels• During Diastole: Stretched vessels gradually return to normal size, keeping some pressure on the blood. BP is low, but not zero.
  7. 7. me
  8. 8. Blood Pressure Reading• Two numbers (Example: 120 / 80)• Higher number = Systolic. Pressure when ventricles are contracting• Lower number = Diastolic. Pressure when ventricles are relaxed
  9. 9. Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)
  10. 10. Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume
  11. 11. Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume3. Resistance (vasoconstriction, atherosclerosis)
  12. 12. Factors that affect blood pressure1. Cardiac output (heart rate x stroke volume)2. Blood volume3. Resistance (vasoconstriction, atherosclerosis)4. Viscosity of blood

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