Describe disorders of Respiratory system in man. | web4study

Describe disorders of Respiratory system in man.


Smoking affects the lungs. Heavy smoking can also damage the heart and blood vessels. Non-smokers are also
affected if they spend much time in a room with people who are smoking. Cigarette smoke contains three main ingredients. These are:

(i) Nicotine (ii) Tar (iii) Carbon mono-oxide

(i) Nicotine: Nicotine is addictive. Once the body gets used to it, it is very hard to do without it. It increases the heartbeat and blood pressure and causes heart

(ii) Tar: Tar increases the chances of getting lung cancer.

(iii) Carbon mono oxide: Carbon mono oxide is poisonous gas



It is the inflammation of the bronchial tubes, which may be caused by smoking or by a bacterial infection. When a
person smokes, tiny particles in the smoke get caught on the lung of the trachea and bronchial tubes. Extra mucus is produced and the cilia stop beating. The mucus collects in the bronchial tubes and this gives rise to the “smokers a cough”. If the tubes become infected, the person may get chronic bronchitis; chronic means long lasting, so the disease persists.



It is another disease of the lungs caused ‘ by bacteria (Mycobacterium tuberculosis) which destroy the lung tissues. It can be diagnosed by chest X-ray and sputum test At one time T.B. was one of the most common causes of death, but modern medicine has now nearly cured it.



Today lung cancer has taken over from T.B. as the major killer. In lung cancer, growth develops in the wall of the
bronchial tubes. This blocks them, so breathing becomes more and more difficult: The lung cancer can be detected by chest X-ray. If a growth is visible, it is – removed by surgery or may be destroyed by radiation therapy.

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