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Our Heart is the central organ, which pumps blood through the arteries to all other organs in order to maintain life. Blood pressure is a measure of the force against the arteries walls, while the heart pumps blood around your body. The more blood your heart pumps and the narrower your arteries, the higher is your blood pressure. The top number of your blood pressure reading tells you the force of the blood against artery walls when your heart beats. It is called systolic pressure. The bottom number tells you what your blood pressure is when your heart is at rest between heartbeats. It is called diastolic pressure. Normal Blood Pressure is below 140/90 mmHg