What does carbon monoxide do inside my body?

When you inhale cigarette smoke into your lungs carbon monoxide attaches to your red blood cells. The carbon monoxide attached to your red blood cells blocks oxygen from attaching to the red blood cells. When oxygen cannot attach to your red blood cells, your body cannot get the oxygen it needs from your blood. 

The more you smoke, the more carbon monoxide is attached to your red blood cells. The more carbon monoxide in your blood, the harder your heart has to work to pump oxygen around your body

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