The average systolic blood pressure is mm Hg.

120

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150

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Solution

The correct option is A 120
Systolic blood pressure is the pressure of blood in the arteries when the ventricles are in systole, i.e., when they are contracting. Diastolic blood pressure is the pressure of blood in the arteries when the ventricles are in diastole, i.e., when they are relaxing. The average systolic and diastolic blood pressure of a human beings are 120 and 80 mm Hg respectively.

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Health Application A doctor reports blood pressure in millimetres of mercury (mm Hg) as a ratio of systolic blood pressure to diastolic blood pressure (such as 140 over 80). Systolic pressure is measured when the heart beats and diastolic pressure is measured when it rests. Refer to the table of blood pressure ranges for adults.
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