Were you looking for information about Blood Pressure? Blood preassure is a common misspelling of blood pressure.
Blood pressure is the force that keeps the blood flowing through the blood vessels so that your body's cells get the oxygen and nutrients they need. This force can be measured in two ways. One is called the systolic pressure (the "top" number of a blood pressure reading), which measures the pressure inside your blood vessels at the moment your heart beats. The second number (the "bottom" number) is your diastolic pressure, which measures the pressure in your blood vessels between heartbeats, when your heart is resting. Many people consider a blood pressure of 120/80 to be normal.
(Click Blood Pressure for more detailed information on how blood pressure is measured and some of the factors that can affect it. You can also click any of the links in the box to the right for specific information.)