Write the name of four respiratory disorders with symptoms.

The four respiratory disorders are as follows :-

(1) Asthma: It is a type of allergic reaction in which mucous of respiratory canal becomes dense and thus expiration is affected. This disease is generally caused due to pollen grains of flowers and some food substances.
(2) Common cold: It is a viral disease in which swelling occurs in mucous membrane and secretion of mucous is also increased. The nose is blocked thus intake of oxygen is difficult.
(3) Lung cancer: The disease is generally found in smokers. The lung tissues growing abnormally and ultimately resulting in the death of the suffering person.
(4) Tuberculosis: It is a bacterial disease of lungs and is caused by Mycobacterium tuberculosis. These bacteria releasing tuberculin toxin which causes fever, loss of weight and weakness in the patient .