Nicotine is addictive and affects the arteries in a negative manner. Heartbeat increases, hypertension occurs and arteries get constricted due to nicotine. Oxygen supply to the heart is stopped due to carbon monoxide. Blood clotting and clogging gets increased. In the case of coronary artery, the supply of oxygen-rich blood to the heart gets decreased due to narrowing of the arteries. This strain leads to a chest pain or angina pectoris.
Apart from the long-term bad effects, cigarette smoking affects the body right at the moment of smoking due to the presence of so many poisonous substances. Arsenic is a rat poison, methane is a rocket fuel, ammonia is used in floor cleaning, cadmium is used in batteries, carbon monoxide is part of car exhaust and hydrogen cyanide is a poison used in gas chambers. Every time one inhales smoke from a cigarette, all these poisonous chemicals enter into the blood through the lungs in small amounts. Even small amounts of such deadly poisons can harm the body.
Smoking makes one smell bad, stains the teeth, causes the skin to wrinkle and gives bad breath. Cavities are found three times more in smokers than non-smokers. Hormone levels get lower due to smoking. Smokers cough for a long time.