March 15--Onion bagel oxyhemoglobin dissociation curve

It was an onion bagel sitting on top of an illustration of the oxyhemoglobin dissociation curve kind of day, as I ate an onion bagel and wondered how to make the oxyhemoglobin dissociation curve understandable to my students. I took a picture, but the bagel was as blurry as my understanding of how to teach the oxyhemoglobin dissociation curve.

In a nutshell, you can be deficient of oxygen and your body will compensate, up to a point. Once that point is reached, your body will decompensated rapidly.