. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. 314: ANIMAL PHTSIOLOGfY. present in this fluid depending much on the length of its stay- in the gall-bladder, which secretes this substance. 7. There is throughout the entire alimentary tract a secretion of mucus which must altogether amount to a large quantity, and it has been suggested that this has other than lubricating or such like functions. It appears that mucus may be resolved into a pro- teid and an animal gum, which latter^ it is maintain
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. 314: ANIMAL PHTSIOLOGfY. present in this fluid depending much on the length of its stay- in the gall-bladder, which secretes this substance. 7. There is throughout the entire alimentary tract a secretion of mucus which must altogether amount to a large quantity, and it has been suggested that this has other than lubricating or such like functions. It appears that mucus may be resolved into a pro- teid and an animal gum, which latter^ it is maintained, like vegetable gums, assists emulsification of fats. If this be true, and the bile is, as has been asserted, possessed of the power to break up this mucus (mucin), its emulsifying effect in the in- testine may indirectly be considerable. Bile certainly seems to intensify the emulsifying power of the pancreatic juice. There does not seem to be any ferment in bile, unless the power to change starch into sugar, peculiar to this secretion in some animals, is owing to such. Comparative.—The bile of the carnivora and omnivora is yellowish-red in color; that of herbivora green. The former contains taurocholate salts almost exclusively; in herbivorous animals and man there is a mixture of the salts of both acids, though the glycocholate Fig. 268.—Gall-bladder, ductus choledochus and pancreas (after Le Bon), a, ^all-bladder; 6, hepatic duct; c, opening of second duct of pancreas ; rf, opening of main pancreatic duct and bile-duct; e, e, duodenum ; /, ductus choledochus ; p, pancreas. Pancreatic Juice.—This fluid is foimd to vary a good deal quantitatively, according as it is obtained from a temporary (freshly made) or permanent fistula—a fact which emphasizes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble th
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