Blood pressure (BP) is the term for an essential function of the body in which as the heart alternately pumps and relaxes the blood in the arteries exerts a force on their walls. Your blood pressure is measured by the combination of two numbers your systolic pressure (written above) and your diastolic pressure (written below). The systolic number measures your blood pressure while the heart pumps blood and the diastolic number (which is regarded as more important aspect out of the two muners) represents the blood pressure between two heart beats. If for some reason (such as if your blood