La consommation pulmonaire, pneumonie, et des maladies des poumons : l'étiologie, la pathologie et le traitement, avec un chapitre sur le diagnostic physique . Fig. II.-poumon gauche. Vue de côté. Fig. 12.-poumon droit. Vue de côté. pendages. Dans les murs de la trachée et des bronches tubesring les cartilages en forme de développer, qui maintiennent ces structuresdistended. Les poumons, comme tous les autres organes, de posséder un cadre tosupport constituant leurs structures. Il se compose d'thepleura, le et interlobulaires interlobaires et intra-alveolarsepta, et de ces sont suspendus les bronches, aircells, nerfs, vaisseaux sanguins

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Pulmonary consumption, pneumonia, and allied diseases of the lungs : their etiology, pathology and treatment, with a chapter on physical diagnosis . Fig. II.—Left lung. Side view. Fig. 12.—Right lung. Side view. pendages. In the walls of the trachea and bronchial tubesring-shaped cartilages develop, which keep these structuresdistended. The lungs, like all other organs, possess a framework tosupport their constituent structures. This consists of thepleura, the interlobular and interlobar and intra-alveolarsepta, and from these are suspended the bronchial tubes, aircells, nerves, blood-vessels and lymphatics, the relation ofeach of which will now be considered to the lungs as awhole. 250 DISEASES OF THE LUNGS. The Pleura. The exterior surface of the lungs is cov-ered by the pleural membrane, which consists of an outer, dense layer—the pleura proper—and an inner loose layer, which dips into the lung and divides it into lobes and lobules, as is shown in figure 13. The matrix of the pulmonary. Fig. 13—Section of normal human lung—xsodiams reduced y.a, small bronchus; bb, branches of pulmonary artery, c, branch ofpulmonary vein; d, air vesicles; e, interlobular septa.—Hamilion. pleura is very similar in structure to that of other serousmembranes, like the synovial sacs, peritoneum, pericardium, etc., except that it contains an abundant supply of unstripedmuscular fibers, between the meshes of which pass thelymphatic vessels in their course towards the bronchial tATH0L06Y OF PULMONARY CONSUMPTION. 251 glands at the root of the kings, and it will be seen hereafterthat the pleural muscular coat bears an important relationto the absorption of lymph and serum from the pleural cav-ities and to the circulation of the same through the pleuralmembrane. For on inspiration the intermuscular meshes arewidened, the lymphatics are distended and absorption isfacilitated, while on expiration the muscular fibres arebrought closer together, compress the lymphatics, and in thiswa

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