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'''Blood pressure''' is the force of [[blood]] exerted on the inside walls of [[blood vessel]]s, and is one of the chief [[vital signs]].  It is measured by a health care professional using a sphygmomanometer. Blood pressure is expressed as a ratio (e.g. 190/110). The first number is the [[systolic]] pressure— the pressure when the [[ventricles]] are contracting, pumping blood into the arteries. The second number is the [[diastolic]] pressure— the pressure when [[ventricles]] are filling with blood and the heart is at rest.  The ideal blood pressure for a healthy, adult male is 120/80.  

'''Blood pressure''' is the force of [[blood]] exerted on the inside walls of [[blood vessel]]s. Blood pressure is expressed as a ratio (e.g. 190/110) The first number is the [[systolic]] pressure, or the pressure when the heart pushed blood out into the arteries. The second number is the [[diastolic]] pressure, or the pressure when the heart rests. Diastolic pressure indicates the resistance of the blood vessels to the flow of blood.

Blood pressure is not static—that is, it is constantly fluctuating. Factors that may attribute to a change in blood pressure include stress, physical exertion, drugs, and even merely from standing up too quickly (referred to as ''orthostatic hypotension'')

[[Hypertension]] (high blood pressure) and [[hypotension]] (low blood pressure) are abnormal medical conditions which can be hazardous to your health.

[[Hypertension]] (high blood pressure) and [[hypotension]] (low blood pressure) are abnormal medical conditions which can be hazardous to your health, though very easily treatable with proper medication, diet, and exercise.

==References==

==References==

* http://www.americanheart.org/presenter.jhtml?identifier=4473

* [http://www.americanheart.org/presenter.jhtml?identifier=4473 American Heart Association]

[[Category:Anatomy]]

[[Category:Anatomy]]