Why is blood pressure called excess pressure? Use the term true pressure.

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Blood pressure is not typically referred to as "excess pressure." It is usually described in terms of "true pressure."

Blood pressure is a measure of the force exerted by the blood against the walls of blood vessels as it circulates through the body. It consists of two components: systolic pressure and diastolic pressure. Systolic pressure is the higher number, representing the force when the heart is contracting and pumping blood into the arteries. Diastolic pressure is the lower number, indicating the force when the heart is at rest between beats.

Blood pressure is not called "excess pressure" because it is a normal and necessary function of the cardiovascular system. It helps to maintain blood flow and deliver oxygen and nutrients to various organs and tissues in the body. If blood pressure is too low, it can impair circulation and lead to inadequate perfusion of organs. Conversely, if blood pressure is consistently too high, it can strain blood vessels and increase the risk of cardiovascular problems.

So, the term "true pressure" is used to describe blood pressure because it reflects the actual force exerted by the blood against the vessel walls during different phases of the cardiac cycle.