( t.MXIVORA QBINO-GENTTAL SYSTEM. 



579 



The liver of the hog consists of four chief lobes ; a right and left external, 

 and a right and left internal ; a small quadrate and a Spigelian lobe exist, the 



i'lG. 141. 



Liver of a Hog posterior view, a, Right external lobe; 6, Bight 

 internal lobe ; c, Left external lobe ; d, Left internal lobe ; e, Spigelian 

 lobe ; /, Posterior cava ; g, Quadrate lobe ; h, Gall bladder ; t, Cystic 

 duct ; k, Ductus Choledocns. 



latter being cleft by a fissure for the posterior vena cava. There is a gall 

 bladder, and the biliary and pancreatic ducts enter the intestine singly. 



RESPIRATORY SYSTEM. 



The anterior extremity of the nose is the snout, which is flat anteriorly, and 

 presents on each side the small, round nasal opening. Like the muzzle of the 

 ruminant, it is always damp in health. At the anterior extremity of the septum 

 iuv?i is the small snout bone, os rostri, covered by cartilage which extends 

 round the nasal openings. 



The nasal fossse are long and narrow. The frontal sinuses extend back- 

 wards to the parietal bone. The larynx is loose and mobile, being attached to 

 the hyoid heel processes by the epiglottis rather than by the thyroid carti- 

 The epiglottis is very large ; the lateral ventricles are large but shallow. 

 The truck c :>. a lid lungs resemble 

 those of the ruminant, and, as 

 in that animal, there is a third 

 bronchus ; the pleural sacs 

 are separated completely. 



URIXO-GEXITAL SYSTEM. 



The kidney is large, simple 

 in form, and like that of the 

 horse externally. The urini- 

 ferous tubes discharge by 

 papillse and calices. The 



I enter tile bladder very near together ; the bladder itself is large, pro- 

 jecting considerably into the abdomen. 



e 



FIG. 14-2. 



Horizontal section of the kidney of a Hog. a, Cortical 

 substance ; 6, Medullary substance ; o, Renal papillae ; d, 

 Infnndibulam : e, Ureter cut across. 



