. The anatomy of the domestic animals . Veterinary anatomy. 548 RESPIKATORY SYSTEM OF THE DOG anterior to the fissure represents the apical and cardiac lobes, which are, however, separated only Idv the cardiac notch, not by an interlobar fissure, as is usual in the Trachea Dorsal border. Cardiac lobe Intermediate lobe Fig. 487.—Right Lung op Pig; AIedial View. 1, Left bronchus (cut off); 2, 2, pulmonary arteries; 5, 5, 3, pulmonary veins; 4. posterior vena cava; 5, groove for anterior vena cava; 6, groove for vena azygos; 7, groove for aorta; 8 (placed on groove for oesophagus), lines of pleur
. The anatomy of the domestic animals . Veterinary anatomy. 548 RESPIKATORY SYSTEM OF THE DOG anterior to the fissure represents the apical and cardiac lobes, which are, however, separated only Idv the cardiac notch, not by an interlobar fissure, as is usual in the Trachea Dorsal border. Cardiac lobe Intermediate lobe Fig. 487.—Right Lung op Pig; AIedial View. 1, Left bronchus (cut off); 2, 2, pulmonary arteries; 5, 5, 3, pulmonary veins; 4. posterior vena cava; 5, groove for anterior vena cava; 6, groove for vena azygos; 7, groove for aorta; 8 (placed on groove for oesophagus), lines of pleural reflection. Arrows indicate interlobar fissures. / right lung. The lobulation is distinct, but the interlobular septa are thinner than in the ox. THE THYROID GLAND The thjTroid gland is large and is situated usually at a considerable distance from the larynx, but may be in contact with it. The lateral lobes are irregularly triangular in outline, and are two inches or more (ca. 5-6 cm.) in length in a large adult. They are united to a considerable extent ventrally, so that an isthmus cannot be distinguished. The gland is related deeply to the sides and ventral face of the trachea, and is in contact dorsally with the oesophagus. The chief artery enters at the posterior extremity. THE THYMUS The thymus in young subjects is very large, extending to the larynx or even to the mandibular space. RESPIRATORY SYSTEM OF THE DOG THE NASAL CAVITY The nostrils are situated on the muzzle, with which the upper lip blends. They are shaped somewhat like a comma, with the broad part next to the septum and the narrow part directed backward and outward. The skin around the nostrils is bare, usually black, and in health moist and cool. The muzzle is marked by a median furrow (philtrum), or a deep fissure in some breeds. The cartilaginous. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of thes
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