<prompt> Velocity of blood flow is inversely proportional to:Square of radiusCompliance of blood vesselCardiac outputStroke volume  <response>: Ans: a Square of radius. Ref: Ganong, 22nd ed, p. 584Velocity of blood flow is inversely proportional to square of radius.Velocity flow rateCross sectional areaQACross sectional area Tubep r2i.e., velocityQpr2 velocity a1r2Some guys are confused because they substituted Poise Villes formula in the above question.According to Poise Ville -Hagen formulaBut this DP is the change in pressure 12 pV2 where p is the density and V is the velocity.Substituting 12 pV2 for pressure DP we arrive at the same conclusion that, velocity al r2 