So let's examine and let's try to describe and understand what this curve actually tells us. So let's begin with the alveoli of our lungs. We know that in the alveoli of our lungs, in the Alveolar space, the partial pressure of oxygen is about 105 mercury. And that means inside the Alveoli, we're going to be at about this position along our X. And if we find the corresponding value along the Y, this graph tells us that about 98% of all the hemoglobin in the capillaries of our lungs will be fully saturated with our oxygen. And that makes sense because the entire point of hemoglobin is to pick up our oxygen within the capillaries of our lungs.