Blood viscosity is a measure of the resistance of blood to flow, which is being deformed by either shear stress or extensional stress. Blood is a liquid that consists of plasma and particles, such as the red blood cells. The viscosity of blood thus depends on the viscosity of the plasma, in combination with the hematocrit. However, plasma can be considered a Newtonian fluid, but blood can not due to the red blood cells which add non-idealties to the fluid. The fluid must reach a shear rate of about 100 (1/sec) to be assumed Newtonian. Until this point is reached the term viscosity can not be applied to blood...