The respiratory system is a very important system in the human body and is very essential for humans to live. Just like everything else in the world, the respiratory system can have many problems, some fatal and some not so harmful. Some of those diseases that can affect your respiratory system are lung cancer, asthma, emphysema, and pneumonia. These diseases don't happen to everyone, but some people are unfortunate, and have to live with those diseases.
             Lung cancer is one of the most popular diseases that every one has probably heard of. Lung cancer begins by cellular changes in the bronchial epithelial cells and can invade adjustment tissues before symptoms are even noticed. There are many types of lung cancer, but most can be categorized into two basic types, small cell and nonsmall cell. In general, the small cell type has usually spread by the time of diagnosis and is treated by chemotherapy or radiation therapy. The nonsmall type may not have spread by the time of diagnosis, and surgical resection of this type may be possible. The spread of cancer can occur to almost any area of the body with the common sites being the brain, bone, bone marrow, and liver. Treatment is based on determining the cellular type of cancer.
             Most of the people who have lung cancer is associated with smoking cigarettes. The more cigarettes you smoke per day, and the earlier you start smoking, the greater the risk of lung cancer. Second hand smoke has also shown to increase in risk. Even high levels of pollution, radiation, and asbestos exposures may also increase the risk.
             Some if the symptoms are: cough, bloody sputum, shortness of breath, chest pain, loss of appetite, and weight loss.
             Another common disease of the respiratory system is bronchial asthma. No cause can be demonstrated for this type of asthma, but it is usually caused by a specific allergy. Systems can occur spontaneously or can be set off by infections dealing with the ...