Why Blood Pressure: Blood pressure is the amount of work your heart does to pump blood to the lungs to get new oxygen and then pumps that oxygenated blood to every single part of your body. This pressure is called systolic and is what it takes to push the blood forward. The bottom pressure, the diastolic, is what it takes to pull the blood back to the heart to start the journey all over.
Answered 4/23/2013
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