The oxygen will dissociate. And as one oxygen dissociates, it makes the other oxygens more likely to dissociate. And this is positive. Cooperativity and we can plot something called the oxygen hemoglobin dissociation curve on the following x Y axis, where the X axis is the partial pressure of the oxygen within our tissue, and our Y axis is the percent saturation of hemoglobin. So we have from zero to 100 and from zero to 100. And the units of our x axis are millimeters per mercury.