. La fisiologia degli animali domestici ... Fisiologia, confronto; Fisiologia Veterinaria. La digestione nel piccolo intestino. 413 sono state raccolte in un'ora, sebbene, naturalmente, il fluido non è stato provenienti esclusivamente dal pancreas, ma conteneva la secrezione effuso bv le ghiandole intestinali. La secrezione pancreatica di hog presenta alcune caratteristiche che sono readity determinata. La fistola è realizzato nello stesso modo del cane e si è poi visto che la secrezione oraria è da cinque a quindici grammi, e che l'attività di secrezione pancreatica è in rapporto inverso a quello del bil

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. The physiology of domestic animals ... Physiology, Comparative; Veterinary physiology. DIGESTION IN THE SMALL INTESTINE. 413 were collected in an hour, though, of course, the fluid was not derived solely from the pancreas, but contained the secretion poured out bv the intestinal glands. The pancreatic secretion in the hog has certain characteristics which are readity determined. The fistula is made in the same manner as in the dog, and it is then seen that the hourly secretion is five to fifteen grammes, and that the activity of the pancreatic secretion is in inverse ratio to that of the bile. In the carnivora the study of this secretion is most readily carried out. In the sheep it is open to difficulties, and has not been as thorough as in the dog. No ratio between the size of the animal or of the gland and the quantity of pancreatic juice is capable of demonstration. Thus, the pancreas of the horse and ox wei°h each three hundred grammes; both animals are about of the same. Fig. 161.—Section of the Pancreas op the Dog in the Fasting Condition, Hardened with Alcohol and Stained with Carmine. (Heidcnhain.) size, and also secrete tbe same amount of pancreatic juice. In the sheep the pancreas weighs from fifty to sixty grammes, or one-fifth as much as in the large ruminants, and yet only pours out seven to eight grammes per hour. In the hog tire pancreas weighs from one hundred and forty to one hundred and eighty grammes, and only secretes ten to fifteen grammes per hour. These results, of course, cannot be too posi- tively accepted, on account of the many disturbing causes. In the pancreas, as in other glands, we may distinguish a period of rest, during which the gland is pale and free from blood, and a period of activity, during which it is swollen and its vessels gorged with arterial blood. Changes occur, therefore, in the pancreas such as have been al- ready described in the case of the salivary glands. In the carnivorous animals the secretion commences when

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• bookcentury1900
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