Pulmonology,

 Pulmonology from Latin "lung" and the Greek suffix -logía "study of") or pneumology built on Greek πνεύμων pneúmōn "lung") is a medical specialty that deals with diseases involving the respiratory tract.[1] It is also known as respirology, respiratory medicine, or chest medicine in some countries and areas Pulmonology is considered a branch of internal medicine, and is related to intensive care medicine. Pulmonology often involves managing patients who need life support and mechanical ventilation. Pulmonologists are specially trained in diseases and conditions of the chest, particularly pneumonia, asthma, tuberculosis, emphysema, and complicated chest infections One of the first major discoveries relevant to the field of pulmonology was the discovery of pulmonary circulation. Originally, it was thought that blood reaching the right side of the heart passed through small 'pores' in the septum into the left side to be oxygenated, as theorized by Galen; however, the discovery of pulmonary circulation disproves this theory, which had previously been accepted since the 2nd century.  

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