The pathological histology of bronchial affections, pneumonia and fibroid pneumonia : an original investigation / by A.G. Auld.

  • Auld, Alexander Gunn.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: The pathological histology of bronchial affections, pneumonia and fibroid pneumonia : an original investigation / by A.G. Auld. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    Further, be it observed that the adventitia of this group is continuous with that of the accompanying blood-vessels, and the interlobular septa, whilst that of the smallest bronchi is continuous with, and passes insensibly into, the supporting structure of the alveolar walls. In respect of their blood supply, it would seem from the careful injections of Waters * that the bronchial arteries supply the whole of the structures of the bronchial tubes, the coats of the blood- vessels, the nerves and lymphatics, and the areolar tissue of the lungs, but not the air sacs, which derive their nutrition from the pulmonary plexus. The bronchial arteries form two plexuses in the air tubes, one which supplies the muscles and deeper structures, the other, the branches of which are very minute, the mucous membrane. Further, these injections seem to leave no doubt that the branches of these two plexuses, as well as the vessels which supply the other structures mentioned, all terminate in the pulmon- ary veins. No direct communication exists between the bronchial and pulmonary arteries. As regards the bronchial veins, according to the same authority there are no vencv comites to the bronchial artery within the lung. The so- called deep bronchial veins do not accompany the bronchial arteries within the lungs, and do not return any portion of the blood which is supplied to the bronchial tubes, but they are simply vessels which return the blood from the struc- tures situated about the root of the lung. In the smallest bronchi there is no doubt but that a very free anastomosis exists betwixt their vessels and these of the dependent lobules. Take now a medium sized bronchus. On examining a transverse section, the mucous membrane will be seen to have a somewhat sinuous outline, and its epithelial margin interrupted at intervals by the trumpet-shaped orifices of * On Diseases of the Chest, art. Anatomy of the Lung.