over the mucous membrane of the Bronchial tubes and which is more closely connected with the Pulmonary Veins will be the very part, which will escape being injected; whereas on the contrary if this plexus were, as is commonly asserted, supplied by the Bronchial arteries, it ought invariably to be injected whenever the Bronchial arteries are themselves filled, but it is shewn that it is impossible to inject this plexus from that source, even in those cases, where by accident a part of the pulmo= =nary capillaries may receive the injection sent into the Bronchial arteries - In giving directions that the injection pipe should be inserted into the arteria innomi= =nata rather than into the commencement of the Aorta several advantages are sought: the necessity for opening the pericardium and wounding the tissue of the heart is avoided; and additional scope is given to the injection by allowing a part to flow into the coronary arteries and the risk of applying the ligature so as to obstruct the passage of the fluid into a principal Bronchial artery is escaped.
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Physiological Anatomy of the Lungs, 1860. From The Royal Society, AP/43/4
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