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. So because of the high partial pressure of oxygen within the Alveoli, our hemoglobin in the red blood cells will easily pick up our oxygen. And so that 98%, or about 98% of hemoglobin will be fully saturated with oxygen within the alveoli of our lungs. So in the alveoli of the lungs, the partial pressure of oxygen in the alveolar space is about one to 5 mercury.