. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. SECTION OF A LEAF OF THE OMASITM. 1, 1, Muscular planes; v, vessel; 2, epithe- lium; 3, 3, small-sized papillae, round and LONGITUDINAL SECTION OF A LARGE PAPILLA FROM THE OMASUM, SHOWING NERVE-CELM IN ITS INTERIOR. the secretion of the gastric juice. Thinner than in monogastric animals, this tenuity is com- pensated for by a much greater extent of surface, which is still further increased by numerous lamellar folds. These latter are analogous in constitution to those of the omasum, cross in a very obliqu
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. SECTION OF A LEAF OF THE OMASITM. 1, 1, Muscular planes; v, vessel; 2, epithe- lium; 3, 3, small-sized papillae, round and LONGITUDINAL SECTION OF A LARGE PAPILLA FROM THE OMASUM, SHOWING NERVE-CELM IN ITS INTERIOR. the secretion of the gastric juice. Thinner than in monogastric animals, this tenuity is com- pensated for by a much greater extent of surface, which is still further increased by numerous lamellar folds. These latter are analogous in constitution to those of the omasum, cross in a very oblique manner the great axis of the abomasum, and altogether aflfect a kind of spiral arrangement. The abomasum has two openings: one, situated at its base, opens into the omasum; the other, placed opposite to tlie first, and much narrower, is the pylorus, which is circumscribed, as in the other animals, by a muscular ring. Structure.—The serous membrane is continuous with the omenta tliat abut on the great and lesser curvatures of the viscus. The muscular layer is of. the same thickness as in the omasum. The internal tunic has already been noticed. Functions of the Stomach in Ruminants.—We cannot pretend to give here a complete history of the phenomena of rumination, but must confine ourselves to describe in a few words what are the principal attributes of each gastric dilatation. The rumen is a sac where the aliment taken during feeding-time is kept in reserve, and whence it is again carried into the mouth during rumination, after having been more or less softened. The reticulum participates in the functions of the rumen, to which it is only a kind of diverticulum. But it is particularly witli regard to liquids that it plays the part of a reservoir; the solid substances contained in it being always diluted by a large quantity of water. The oesophageal groove carries into the omasum the substances swallowed a second time after rumination, or even those which the animal ingests
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Keywords: ., bookauthorcha, bookcentury1900, bookdecade1900, booksubjecthorses
