Carbon monoxide connects to red blood cells, robbing your body of the oxygen it requires to live. It mixes with these cells more than 200 times more easily than oxygen, leading to a condition known as carboxyhemoglobin saturation.
Carbon monoxide, on lieu of oxygen, then gets taken to the important organs via the bloodstream. In short, carbon monoxide robs your body of oxygen. Organs require oxygen; without it, they begin to suffocate.
Your body needs a long time to get rid of carbon monoxide; however, it can be taken in much more quickly.