And what that means is a very small change in partial pressure will cause almost all of that hemoglobin to fully unload its oxygen. And that will ensure that all the oxygen is readily delivered to the exercising and active tissue. So on this side of the curve we see that a small drop in pressure will basically unload most of that oxygen. But on this side of the curve we see that we can basically experience a relatively large change in pressure, but our oxygen will still take up our hemoglobin will still take up the oxygen. And this is important because on this side we are within our lungs and on this side we are within our tissues. So when we're in the lungs, we want to make sure that even if we have a drop in pressure, the hemoglobin can still actually bind that oxygen.