When blood flows along a blood vessel, the relationship between the flux F (volume of blood per unit time that flows past a given point) and the radius R of the blood vessel is given by Poiseuille's Law F = KR, where k is a dF constant. When a small change in the radius of a blood vessel, dR, is produced, the relative change in flux is F Suppose the radius of a blood vessel is determined to be R = 2 mm. If the radius of the blood vessel widens by dR = 0.1 mm, approximate the relative change in flux. + Drag and drop an image or PDF file or click to browse