Today, we can say that all cigarette smokers are addicts. When a person smokes, their body responds immediately to the chemical nicotine in the smoke. Nicotine will cause a short-term increase in blood pressure, heart rate, and the flow of blood from the heart. It will also cause your arteries to narrow. The Carbon monoxide reduces the amount of oxygen the blood can carry and this , combined with the effects produced by nicotine, will create an imbalance in the demand for oxygen for the cells and the amount of oxygen that the blood will be able to supply.
Smoking also increases the amount of fatty acids, glucose, and various hormones in the blood.
Increase in heart rate. Decrease in stamina and energy. Decreased amount of oxygen in the blood. Decreased circulation of blood especially to the heart, arms and legs. Hardening of the arteries can eventually lead to heart attack or stroke.