A small blood vessels near skin surface has a radius of 10um a length of 1 um and the pressure drop along the blood vessels is 2.50Pa.The viscosity of the blood is 0.00027pPa.s. i. What is the volume flow rate of blood through this blood vessels?   What is the velocity of blood flow? ii.Vasodilation causes the radius of thus blood vessels to increase to 12um, while leaving the pressure drop along the vessel unchanged? What is the volume flow rate through this blood vessel now? What  is the velocity of blood flow?

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Variation of pressure

From the equation of pressure, pressure is directly proportional to the applied force.