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Blood is a fluid circulating in a close system. Just like any pipes, there is a "pressure" at which the fluid is maintained. Blood has a pressure that is maintained within a normal range by various aspects of the circulatory system, such as the heart (pumps to increase/maintain pressure), walls of blood vessels (muscles constrict or dilate blood vessels to increase or reduce blood pressure), clotting (which maintains a closed system by preventing leakage, i.e. bleeding), and numerous other aspects. High blood pressure is called hypertension; low blood pressure is called hypotension.
Blood pressure : force exerted by the blood on the walls of the arteries and other vessels.
Blood pressure: The level of pressure of the blood in blood vessels.
Condition count: 5 ; see list below.
Organs: list of all organs
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