Carbon monoxide connects to red blood cells, robbing your body of the oxygen it needs to live. It mixes with these cells over 200 times more easily than oxygen, resulting in a condition known as carboxyhemoglobin saturation.
Carbon monoxide, instead of oxygen, then gets brought to the essential organs by the bloodstream. To put it simply, carbon monoxide deprives your body of oxygen. Organs have to have oxygen; when they lack it, they begin to suffocate.
Your body takes a long time to get rid of carbon monoxide; however, it can be drawn in much more quickly.