Well, these properties of myoglobin as described here, makes it a perfect molecule to store the oxygen inside our cells. In fact, myoglobin, and that's why it's called mayo. Myo means myocide, or muscle cell myoglobin, is used to store oxygen inside our muscle cells. Myoglobin only releases that oxygen to the muscle cells when the concentration drops to a very small value. And when it drops below a certain value, ultimately, all these myoglobin molecules in a cell will release that oxygen together. And that's exactly what the sharp increase or decrease in that blue curve actually means.