explain the following blood pressure
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When your doctor takes your blood pressure, it's expressed as a measurement with two numbers, with one number on top (systolic) and one on the bottom (diastolic), like a fraction. For example, 120/80 mm Hg. The top number refers to the amount of pressure in your arteries during the contraction of your heart muscle.
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As the blood travels through the arteries it pushes against the sides of these blood vessels and the strength of this pushing is called your blood pressure. As your heart squeezes and pushes your blood through your arteries, your blood pressure goes up. As your heart relaxes, your blood pressure goes down.
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