Oxygen–hemoglobin dissociation curve
S-shaped curve produced when the percentage saturation of haemoglobin with oxygen is plotted against the partial pressure of oxygen , which is a measure of the oxygen concentration in the surrounding medium
The oxygen–hemoglobin dissociation curve, also called the oxyhemoglobin dissociation curve or oxygen dissociation curve (ODC), is a curve that plots the proportion of hemoglobin in its saturated form on the vertical axis against the prevailing oxygen tension on the horizontal axis. This curve is an important tool for understanding how our blood carries and releases oxygen. Specifically, the oxyhem... Wikipedia