416 



THE DIGESTIVE APPARATUS IN MAMMALIA. 



of the abdomen, and afterwards suspended by the short mesenteric framum which 

 resembles the great colic mesentery of Solipeds. It is worthy of remark that the great 



mesenteric artery goes to the 



Fisr. 209. first, and the small mesen- 



teric to the second portion, 

 as in the Horse. 



Measured throughout its 

 whole extent, from the caecal 

 cul-de-sac to the anus, the 

 large intestine of the Ox is 

 from 33 to 39 feet. It is, 

 therefore, longer than that 

 of the Horse; but its capa- 

 city is much less, for it does 

 not exceed from 6 to 7 

 gallons. 



2. TJie Intestines of the Pig. 



The average length of 

 the Pig's intestines is about 

 72 feet, of which 56 go to 

 the small, and ]6 to the 

 large intestine. 



In their general dispo- 

 sition they bear some resem- 

 blance to those of the Ox ; 

 though only the last portion 

 of the colon is included be- 

 tween the layers of the me- 

 sentery, it being, for the 

 remainder of its extent, out- 

 side that membrane, where 

 it forms a distinct mass. 



Among the peculiarities 

 of the small intestine, may 

 be cited the presence of an 

 immense Peyerian gland, 

 which occupies the latter 

 portion of the canal, where 

 it figures as a band measur- 

 ing from 5 to 6 feet in 

 length. 



The cxcum shows, on its 

 internal surface, some Peye- 

 rian patches, itisbosselated, 

 as in the Horse, and is fur- 

 nished with three longitu- 

 dinal bands. The colon has 

 two of these muscular bands 

 in a portion of its track, and 

 even three towards the cae- 

 cum ; as well as some trans- 

 verse folds. It is doubled 

 exactly as in the Ox 



INTESTINES OF THE DOG. 



<7, Stomach ; 6, Duodenum ; c, Jejunum ; d, Ileum ; e. Caecum; 

 /, Ascending colon ; </, Transverse colon ; h, Origin of des- 

 cending colon ; z, Great omentum ; k, Spleen ; /, Mesentery ; 

 m, Pancreas. 1, Aorta ; 2, Great mesenteric artery ; 3, 

 Artery of the duodenum ; 4, Artery of the large intestine , 

 5, Small mesenteric artery. 



3. The Intestines in Car- 

 nivora. (Fig. 209.) 



The intestines of the 

 Carnivora are remarkable 

 for their shortness and small 

 volume. In a Dog of ordi- 

 nary size, they scarcely measure more than 14 feet in length, of which only 24 to 28 

 inches are for the large intestine. In the Cat, the latter is about one-half this length, 

 and the entire extent of the viscus is equal to about 6 or 7 feet. With regard to 



