214 



PHYSIOLOGY OF THE DOMESTIC ANIMALS. 



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

 distensible than in ruminants, where the preliminary mastication is less 

 complete. 



Fig. 72.— Digestive Tract of the Dog, after Bernard. 



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

 C, right carotid ; C, jugular vein ; P P, lungs, that on the left opened to show the bronchial tubes, arteries, 

 and veins; VC. superior vena cava ; K, aorta; II, right auricle of the heart; H', left auricle; F', right 

 ventricle; O, left ventricle ; P', pulmonary artery : TT, thoracic duct; F, liver; B, gall-bladder, enter- 

 ing the intestine by the duct, B'; E, stomach ; R, spleen ; S, Pecquet' a 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, caicum ; R, colon, or large intestine. 



