Pleurisy (Pleuritis) :- Inflammation of pleura due to accumulation of pleural fluid.
Emphysema :- It is due to decrease in alveolar elasticity.lung size increases but ventilation is poor.
Asphyxia :-Paralysis of respiratory centre due to excessive carbon dioxide. It may result in death.
Pneumonia :- It is commonly caused by streptococcus or Diplococcus pneumoniae.
Whooping cough (Pertusiss) :- It is caused by brodetella (haemophillus) pertussis.
Diphtheria :- Inflammation of bronchi and bronchioles due to hypertrophy and hyperplasia of seromucous glands and goblet cells. common in smokers.
Bronchial Asthma :-It is generally due to hypersensitivity of bronchioles to a foreign substance.There is intense coughing and difficulty in exhalation.
Cyanosis :- Bluish discolouration of the mucous membrane.
