Factors that Influence Arterial Blood Pressure

Arterial pressure depends on a variety of factors. These include heart action, blood volume, resistance to flow, and blood viscosity (fig. 15.35).

Heart Action

In addition to producing blood pressure by forcing blood into the arteries, heart action determines how much blood enters the arterial system with each ventricular contraction. The volume of blood discharged from the ventricle with each contraction is called the stroke volume and equals about 70 milliliters in an average-weight

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