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Blood pressure

Blood pressure is the pressure exerted by the flow of blood through the major arteries to the body. This pressure is greatest during the contraction of the ventricles of the heart (systolic pressure), which forces blood into the arteries’ system.
Pressure falls to its lowest level when the heart is filling with blood (diastolic pressure). Blood pressure is measured in millilitre using an instrument called a sphygmornanometer. Normal blood pressure for a young average adult human is in the region of 120/80 mmHg (the higher number of the systolic blood pressure; the lower the number of the diastolic blood pressure), but individual variations are common.




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