INTESTINAL DIGESTION, 193 
Intestinal Digestion; Chylification. 
; (22. The process of digestion is by no means completed in 
the stomach ; for much of the matter which escapes from it 
in the chyme, i is destined to undergo a further change whilst 
passing through the intestinal canal ; especially in the her- 
pivorous tribes, whose food, being less digestible than that of 
the carnivorous races, requires to be longer delayed in the 
intestinal canal, in order that it may yield up its nutritious 
portion. Hence we find this canal of enormous extent in 
Scat animals whose food is vegetable, being in the Sheep 
about twenty-eight times the length of the body ; in the 
purely carnivorous animals, on the other hand, it is compara- 
avely short, being in the Lion only about three times the 
leng h of the body, while in the Serpent it runs almost 
traight from one extremity to the other; and in animals 
which live on a mixed diet, it is of medium length, being 
a Man about six times as long as his body. The intes- 
* tube is usually distinguished into the ne and the 
ge intestine ; of which the small is the first portion, and 
he SSeS the second. The former, as shown in fig. 108, is 
disposed in a convoluted or twisted manner, sO that a great 
sxtent of it may be packed ‘within a small compass; it 
usually forms about three-fourths of the whole length of the 
ce ne It is held in its place by a serous membrane termed 
2 peritoneum, which forms an immense number of folds 
th at suspend it (as it were) from the vertebral column ; but 
these still allow it a considerable power of movement. 
“213. Soon after passing from the stomach into .the intes- 
inal canal, the food is mingled with three secretions, which 
lave an important influence on the changes it is further to 
undergo ; 3 these are the Bile, the Pancreatic fiuid, and the In- 
estinal juice. The two former are prepared by two large glan- 
lar masses, the Liver and the Pancreas (or sweetbread), 
which, in all the higher animals, are completely detached 
rom the alimentary canal, and send their secretions into it 
arough special ducts ; the latter, like the gastric juice, is 
ormed in little follicles lodged in the wall of the canal itself. 
ae peculiar matter which forms the chief solid constituent of 
ni ile, is essentially a soap formed by the union of two resinoid 
ids, with soda as a base (§ 364). The composition of the 
; oO 
