Now, what is the physiological meaning behind this? Well, what this means is our body can actually use the myoglobin for oxygen storage to basically store the oxygen until it really, really needs it, when the cells have a very low concentration of oxygen. And that's exactly why myoglobin is the protein that is used by the muscle cells of our body to basically store the oxygen until that moment when we have very little oxygen found inside our body, when the lungs can no longer deliver the oxygen to the tissue of our muscle effectively and efficiently. Now, why does my globin observe this behavior? Well, it turns out because it turns out that myoglobin has these properties because it only consists of a single polypeptide chain. Because it consists of only a single chain, it only consists of a single heme group.