carbon monoxide in cigarette smoke severely affects the ability of your blood to carry oxygen around the body. As a result, your heart has to work harder to supply your body with Cigarettes contain thousands of chemicals—over

Cigarettes contain thousands of chemicalsover 7,000 have been identifiedmany of which are toxic, and at least 70 are known to cause cancer. When a cigarette burns, these chemicals are inhaled deep Combustion in Cigarettes Smoke Free Approach PMI Science Cigarette smoke does not stop at your lungs. Some harmful chemicals enter your bloodstream, including carbon monoxide, a gas that can reduce how much oxygen your blood carries. When your blood carries Chapter 9: Gas Exchange and Smoking What does smoking do to your body?

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