Long term effects of smoking on the breathing system
(Effects of Smoking in Different Parts of the Respiratory & Circulatory System)
- Cigarette smoke is acidic and contains many different chemicals. As a result it can cause irritation of the lining of the bronchi and bronchioles. The lining becomes inflamed and swollen and may also become infected. Each time you smoke another cigarette it adds to the irritation. This can last for months and even years, causing shortness of breath, coughing and chest pain. This is known as chronic bronchitis.
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- Tobacco smoke contains tar, a black, sticky substance as well as many other chemicals. This coats the lining of the alveoli and greatly increases the risk of emphysema. The structure of the alveoli breaks down so that there are fewer, larger air sacs. This reduces the surface area available for gaseous exchange and makes sufferers breathless. They may need oxygen and it can be a cause of death.
- The chemicals in the tar deposited from tobacco smoke can cause mutations(changes) in the nucleus of some of the cells lining the air ways. They start to grow out of control- which is now called Lung Cancer.