So if we increase the length or if we increase our viscosity, we increase the resistance of our blood vessel. But by increasing our radius, we basically increase the denominator, and that decreases our resistance. So we see we have an inverse relationship between our resistance and our radius. In fact, we see that by changing our radius, that actually affects our resistance the most. And that's because the radius is raised to the power of four. So to see what we mean, let's take a look at the following three bullet points.