What is blood pressure?
Blood pressure is the pressure of the blood against the walls of the arteries. Blood pressure results from two forces. One is created by the heart as it pumps blood into the arteries and through the circulatory system. The other is the force of the arteries as they resist the blood flow.

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1. What is blood pressure?
2. What do blood pressure numbers indicate?
3. What is high blood pressure?
4. How can I tell if I have high blood pressure?