# The radius of the aorta is about 1.5 cmcm, and the blood passing through it has a speed of about 38 cm/s. Coefficient of viscosity for the whole blood (37∘) is η = 4×10−3Pa⋅s×10^-3 Pa ⋅ s. Calculate the pressure drop per cm along the aorta.

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 radius of the aorta is about 1.5 cmcm, and the blood passing through it has a speed of about 38 cm/s. Coefficient of viscosity for the whole blood (37∘) is η = 4×10−3Pa⋅s×10^-3 Pa ⋅ s. Calculate the pressure drop per cm along the aorta.

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