. Un texte-livre de physiologie comparée [microforme] : pour les étudiants et les praticiens de médecine vétérinaire (comparatif). La Physiologie, physiologie vétérinaire ; comparatifs ; physiologie comparée ; physiologie vétérinaire. I. 858 PHYSIOLOGIE COMPARATIVE. tion est exceptionnellement actif, comme c'est bien vu dans le chien ; si le stom- ach est ample l'intestin est plus courte, également illustré dans ce groupe. L'estomac peut être de petite taille et le petit" inte- pas les dents longues, mais le gros intestin d'énorme sise, comme chez le cheval. Lorsque la quantité de matières amylacées trouvés dans la nourriture de l'animal est grand, provis

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. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. I. 858 COMPARATIVE PHYSIOLOGY. tion is unusually active, as is well seen in the dog; if the stom- ach is capacious the intestine is shorter, also exemplified in this group. The stomach may be small and the small inte»- tines not lengthy, but the large intestine of enormous sise, as in the horse. When the quantity of starchy matters found in the food of the animal is large, provision is made for its digestion in sev- eral parte of the alimentary tract. This is seen in the horse and other herbivora. Mastication is fairly complete in these animals, yet a part of the small stomach of the horse is a sort of oesophageal dilatation (Fig. 266) in which amylolytic diges- tion goes on by the action of the swallowed saliva and possibly by a ferment provided in this region of the organ. The gastric juice of the horse has been proved capable of digesting starch, possibly because mixed with the swallowed saliva. The stomach of the pig is large, and both proteid and starchy digestion exceedingly active. In the intestines tiie pro- cesses are of brief duration, but very effective. Digestion in the upper part of the small intestines is, in some ftpiniRlH, as the horse, really a continuation of that in the stomach; or, at all events, the contente of the duodenum and jejunum are usiially acid in reaction, so that the digestion peculiar to one region of the tract does not always abruptly end when food has left that part The readiness with which food passes horn the stomach into the intestines is very vari- able in different animals, and even in the same animal under different circumstances. In the horse the pyloric orifice seems never to be very tightly dosed, though in most of our domestic animals the reverse is the case; and with them the quantity of undigested mate

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