416 



THE DIGESTIVE APPARATUS IN MAMMALIA. 



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

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



mesenteric artery goes to the 

 Fio-. 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 GJ to 7| 

 gallons. 



2. Tlie Intestines of the Pig. 



The average length of 

 the Pig's intestines is about 

 72 feet, of which 56 go to 

 the small, and 16 to the 

 large intestine. 



In their general dispo- 

 sition they bear some resem- 

 blance to those of the Ox ; 

 though only the last portion 

 (if 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 6J feet in 

 length. 



The ciecum shows, on its 

 internal surface, some Teye- 

 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 cse- 

 cum ; as well as sume trans- 

 verse folds. It is doubled 

 exactly as in the Ox 



a, Stomach ; h, Duodenum ; c, Jejunum ; d, Ileum ; e, Caecum ; 

 /, Ascendmg colon ; g, Transverse colon ; A, Origin of des- 3. 2*7(6 Intestines in Car- 

 cending colon ; i, Great omentum ; !i, Spleen ; I, Mesentery ; nivora. (Fig. 209.) 



m, Pancreas. — 1, Aorta; 2, Great mesenteric artery; 3, T^he intestines of the 



Artery of the duodenum ; 4, Artery of the large mtestine ; Qarnivora are remarkable 

 5, Small mesenteric artery. 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 larjie intestine. In the Got, the latter is about one-lialf th's length, 

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



INTESTINES OF THE BOG. 



