It contains 100% of that blood. So our x axis describes the pressure in millimeters of mercury. So we have 5100, 100 and 5200 and so forth. Now, the line, the slope of this line designates our value for our C, which is the compliance. So if we bring this over to this side, the C will basically describe our compliance. And the higher the slope is, the greater the value of C compliance is.