But what the helldon effect does is it takes the opposite perspective. It talks about how the concentration of oxygen inside the red blood cell, inside our blood actually affects hemoglobin's affinity for carbon dioxide and H plus ions. Now, why is the Haldane effect actually important? Well, as we'll see in just a moment, the Held in effect actually promotes it increases the amount of carbon dioxide that can be released by the exercising tissue to the blood. And at the same time, it also increases the number of CO2 molecules that can be absorbed by the alveoli of the lungs from the blood plasma. And to see what the Halin effect is and how it achieves this, let's begin by taking a look at the following diagram.