. The anatomy of the domestic animals . Veterinary anatomy. THE LUNGS 53X third of its original size, and loses its proper form; this is due to its highly elastic character and the fact that the tension of the lung tissue caused by the air pressure m its cavities has been relieved by the external air The color varies according to the amount of blood contained in the lung. During life the lung has a pink color, but in subjects which have been ibled for dissection it is light gray or famtly tinged with red. In unbled subjects it is dark red; the depth of color varies, and is often loc
. The anatomy of the domestic animals . Veterinary anatomy. THE LUNGS 53X third of its original size, and loses its proper form; this is due to its highly elastic character and the fact that the tension of the lung tissue caused by the air pressure m its cavities has been relieved by the external air The color varies according to the amount of blood contained in the lung. During life the lung has a pink color, but in subjects which have been ibled for dissection it is light gray or famtly tinged with red. In unbled subjects it is dark red; the depth of color varies, and is often locally accentuated by gravitation of blood to the most dependent parts (hypostasis). The foetal lung, since it contains no air and has a relatively small blood-supply, differs from that of an animal which has breathed in the following respects: (1) It is much smaller; (2) it is firmer and does not crepitate; (3) it sinks in water; (4) it is pale gray in ,color. In form the lungs are like casts of the cavities in which they are situated. When well hardened in situ, their surfaces present bo r der. Fig. 472.—Right Lung of Hoese; Costal Surface. Specimen hardened in situ. impressions and elevations corresponding exactly to the structures with which they are in contact. Each lung presents two surfaces, two borders, a base, and an apex. The costal surface (Fades costalis) is convex, and lies against the lateral thoracic wall, to which it is accurately adapted. The mediastinal surface (Facies mediastinalis) is much less extensive than the costal surface. It is molded on the mediastinum and its contents. It presents a large cavity adapted to the pericardium and heart; this is termed the cardiac impression (Impressio cardiaca), and is larger and deeper on the left lung than on the right. Above and behind this is the hilus of the limg (Hilus pulmonis), at which the bronchus, vessels, and nerves enter the lung; the bronchial lymph glands are also found here. Behind this the two lungs are
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