Ch#13 |Gaseous Exchange| Lec #14 |Respiratory Disorders(Lung Cancer, Tuberculosis)FSc Biology part 1

RESPIRATORY DISORDERS:
1. Lung Cancer:
Many problems in the respiratory system can take place of inside lining is exposed continuously to unhealthy air containing smoke and other pollutants.
Cancer or carcinoma is basically malignant tumor of potentially unlimited growth that expands locally by invasion and systemically by metastasis.
Lung cancer is one of the most serious diseases of respiratory system.
Cancer can respiratory passages as the tumor replaces lung tissue.
Causes of Lung Cancer:
Smoking especially in young adults is the most potential threat of lung cancer.
The chances of lung cancer are ten times more in those persons who smoke or live in smoky and congested areas as compared to those who do not smoke.
It is now estimated that 90% of lung cancer is caused by smoking.
Recent research indicates that more that ten compounds of tar of tobacco smoke are involved in causing cancer.
2. Pulmonary Tuberculosis: Disorder of respiratory system
Pulmonary tuberculosis a disease of lungs in which inside of the lung is damaged resulting in cough and fever.
It is more common in poor people.
Causes and Cure of T. B: T.B is the general name of a group of diseases caused by Mycobacterium tuberculosis.
Malnutrition and poor living conditions facilitate Mycobacterium to grow the disease.
It is curable with proper medical attention.
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