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The lining that surrounds the lungs and helps to protect them and to facilitate the sliding motion during breathing is called the pleura. At the end of the bronchioles are tiny air sacs known as alveoli.Most lung cancers start in the lining of the bronchi.
Lung cancers are thought to develop over a period of many years.
Men have a higher chance of getting lung cancer because, as studies done by the smokers association show, “men smoke more than women do, but since women started smoking in larger numbers, more women are getting lung cancer.”3 Lung cancer incidence rates are similar among African-American and white women.
Among men lung cancer occurs about 50% more frequently among African-American men than among white men.
1 According to cancerhelp.net, some of the symptoms that may suggest lung cancer are: Shortness of breath can be caused by the cancer growing in the airway.
This can lead to accumulation of discharges, exposing people to pneumonia.