<P> where H is the total height of the liquid column above the test area to the surface, and p is the atmospheric pressure, i.e., the pressure calculated from the remaining integral over the air column from the liquid surface to infinity . This can easily be visualized using a pressure prism . </P> <P> Hydrostatic pressure has been used in the preservation of foods in a process called pascalization . </P> <P> In medicine, hydrostatic pressure in blood vessels is the pressure of the blood against the wall . It is the opposing force to oncotic pressure . </P> <P> Statistical mechanics shows that, for a gas of constant temperature, T, its pressure, p will vary with height, h, as: </P>

Where is the hydrostatic pressure of the blood created