The flow rate of blood through a 2.00×10–6-m -radiuscapillary is 3.80×109 cm3 /s . (a) What is the speed of theblood flow? (This small speed allows time for diffusion ofmaterials to and from the blood.) (b) Assuming all the blood inthe body passes through capillaries, how many of them mustthere be to carry a total flow of 90.0 cm3 /s ? (The largenumber obtained is an overestimate, but it is still reasonable.)
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
The flow rate of blood through a 2.00×10–6-m -radius
capillary is 3.80×109 cm3 /s . (a) What is the speed of the
blood flow? (This small speed allows time for diffusion of
materials to and from the blood.) (b) Assuming all the blood in
the body passes through capillaries, how many of them must
there be to carry a total flow of 90.0 cm3 /s ? (The large
number obtained is an overestimate, but it is still reasonable.)
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