Smoking increases the risk of cardiovascular disease in several ways: it damages the lining of the arteries, reduces the amount of oxygen that can be carried by the blood, increases the heart rate, and increases the likelihood of blood clotting.
Inhalation of carbon monoxide, a poisonous gas produced during incomplete combustion in cigarette smoke, reduces the amount of oxygen that can be carried by the blood.
COPD or chronic obstructive pulmonary disease is the name to several lung diseases that restrict air flow in the lungs and cause breathing difficulties for a patient.
Smoking during pregnancy increases the risk of miscarriage and can lead to babies and children being more likely to suffer from respiratory infections and an increased risk of asthma.
The trend in the rate of developing lung cancer for women has been increasing, while in men is decreasing, due to the increase in female smokers in the 1950s and 1960s before starting to fall.