One thing that tobacco advertisements do not show is that smoking causes heart disease, cancer and lung diseases.
Cigarette smoke contains several thousand chemicals.
Carbon monoxide, the poisonous gas also present in car exhaust fumes, is picked up by the blood much more readily than oxygen. This means that the heart has to work much harder to get enough oxygen to all parts of the body. Nicotine stimulates the nervous system which leads to an increase in the heart rate and a constriction of the blood vessels. This puts a strain on the heart. Nicotine also makes the blood more likely to clot.