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Blood pressure is the force your circulating blood exerts against the walls of your arteries. Blood flow is the movement of blood through your body, and resistance is the pushback that's against the blood flow in the circulatory system. Blood pressure, flow, and resistance are all closely related. Your blood pressure is determined by two things: the amount of blood flowing through your arteries and the diameters (widths) of those vessels. The more blood that flows through the arteries and the narrower those vessels are, the higher your blood pressure will be.
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