PHYSIOLOGY OF THE DOMESTIC ANIMALS. 



thoroughly masticate their food, as in solipecles, it is narrow and less 

 distensible than in ruminants, where the preliminary mastication is less 

 complete. 



B'- 



FIG. 72. DIGESTIVE TRACT OF THE DOG, AFTER BERNARD. 



P, parotid gland; G, -submaxillary gland : G", sublingual gland; OE, oesophagus, or gullet; 

 ht carotid ; C, jugular vein ; PP. lungs, that on the left opened to show the bronchial tubes, arteries, 



"I, right auricle of the heart; H', left auricle: F', right 

 ventricle ; O, left ventricle ; P', pulmonary artery ; T T, thoracic duct ; F, liver ; B, gall-bladder, enter- 



ed, right carotid ; C, jugular 

 and veins; VC', superior ve 



na cava ; K, aorta ; H, rip 



ing the intestine by the duct, B'; E, stomach; R, spleen; S, Pecquet's reservoir: J, lymphatics; M, 

 mesenteric ganglia; VP, trunk of portal vein; V V, origins of portal vein ; W, pancreas; VC. inferior 

 vena cava ; D, duodenum ; VL, lacteals ; I, small intestine ; Q, caecum ; R, colon, or large intestine. 



