The purpose of this project is to correlate the blood pressure to the heart's pumping of blood. Blood pressure varies relative to heart's pumping of blood. The heart should be thought of as a dual pump, with a right and left side. Systole represents the active pumping of blood from the ventricles into the circulation. The right side of the heart takes venous/returning blood from the body and sends it to the lungs to be oxygenated (pulmonary circulation). Measuring blood pressures on the right side of the heart requires very complicated equipment. The left side of the heart takes the oxygenated blood and sends it to the rest of the body. When you take a blood pressure reading, you measure pressures in the systemic circulation. The highest pressures occur during systole as blood is ejected into the aorta and subsequent arteries of the body. Diastole, the heart's resting phase, follows systole. During diastole the ventricles fill with more blood. Systemic pressures fall until more blood is ejected during systole.