DISEASES OF THE LUNGS. 



Divisions of lung diseases. Bronchitis, pneumonia, pleurisy, their re- 

 sults, nervous disorders, asthma, hiccough. C^dema. Emphysema. Mor- 

 bid growths, neoplasms. Infectious and parasitic diseases. 



Inflammatory diseases of the respiratory organs situated within 

 the chest may be divided into : inflammation of the air tubes 

 within the substance of the lung.s — bronchitis : — inflammation of 

 the spongy tissue of the lung — -pneumonia : — ^inflammation of the 

 covering of the lungs and lining serous membrane of the chest — 

 pleurisy : — and complicated cases in which two or more of these 

 conditions coexist. Beside inflammatory diseases there are the 

 various permanent morbid results of these affections, such as con- 

 solidation of lung from exuded products becoming organized ; 

 collapse (compression) of lung from organization and contraction 

 of false membranes, thickening or dilatation of bronchial tubes 

 as a result of bronchitis ; also nervous affections, such as asthma 

 and hiccough ; morbid alterations in the lung tissue independently 

 of inflammation, as pulmonary or pleural cedema and emphy- 

 sema ; specific morbid deposits, as tubercles, glander nodes, 

 cancer, melanosis, etc., and morbid states, due to parasites, as 

 in the verminous affections of cattle, sheep, etc. 



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