Blood pressure is the force exerted by circulating blood on the walls of blood vessels, and constitutes one of the main vital signs. Blood pressure is generated by the heart pumping blood into the arteries and is regulated by the arteries to the flow of blood.
By principle, an individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80.The systolic blood pressure (the top number) represents the force in the arteries as the muscle of the heart contracts and pumps blood into them. The diastolic blood pressure (the bottom number) represents the force in the arteries as the muscle of the heart relaxes after it contracts. Blood pressure always is high when the heart is pumping than when it is relaxing.
By principle, an individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80.The systolic blood pressure (the top number) represents the force in the arteries as the muscle of the heart contracts and pumps blood into them. The diastolic blood pressure (the bottom number) represents the force in the arteries as the muscle of the heart relaxes after it contracts. Blood pressure always is high when the heart is pumping than when it is relaxing.
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