Carbon monoxide connects with red blood cells, robbing your body of the oxygen it has to have to survive. It blends with these cells over 200 times more easily than oxygen, leading to a condition known as carboxyhemoglobin saturation.
Carbon monoxide, in place of oxygen, then gets taken to the vital organs through the bloodstream. Simply put, carbon monoxide robs your body of oxygen. Organs have to have oxygen; when they lack it, they begin to suffocate.
Your body takes a long time to eliminate carbon monoxide; however, it can be drawn in much faster.