. The comparative anatomy of the domesticated animals. Veterinary anatomy. 464 THE DIGESTIVE APPARATUS IN MAMMALIA. These cavities represent a considerable mass that fills the greater part of the abdominal cavity, and the medium capacity of which is not less than fifty-tive gallons! One of them, the Rumen, into which the oesophagus is inserted, constitutes nine-tenths of the total mass. The other three, the Reticulum, Omasum, and Ahoruasum, form a short chain, continuous with the left and anterior portion of the rumen. The abomasum alone should be considered as a true stomach, analogous to tha
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 464 THE DIGESTIVE APPARATUS IN MAMMALIA. These cavities represent a considerable mass that fills the greater part of the abdominal cavity, and the medium capacity of which is not less than fifty-tive gallons! One of them, the Rumen, into which the oesophagus is inserted, constitutes nine-tenths of the total mass. The other three, the Reticulum, Omasum, and Ahoruasum, form a short chain, continuous with the left and anterior portion of the rumen. The abomasum alone should be considered as a true stomach, analogous to that of the Dog, or the right sac of the ventriculus of Solipeds. The other three compartments only represent, like the left sac in the latter animals, oesopha- geal dilatations. The description about to be given of each of these divisions more particularly applies te the Ox; care will be taken, in the proper place, to note the special peculiarities in the stomach of the Sheep, Goat, and Camel. Rumen (Figs. 2G8, 271).—This reservoir, vulgarly designated the paunch, alone occupies three-fourths of the abdominal cavity, in which it affects a direction inclined from above to below, and from left to right. External conformation.—Elongated from before to behind, and depressed from above to Fig. OTOMACH OF THE OX, SEEN ON ITS RIGHT UPPER FACE, THE ABOMASUM BEING DEPRESSED. A, Rumen, left hemisphere; B, rumen, right hemisphere; C, termination of the oesophagus; D, reticulum ; E, omasum: F, abomasum. below, it offers for study : 1. An inferior and a superior face, nearly plane, smooth, and divided into two lateral regions by traces of fissures, which are only sensible at the extremities of the organ. 2. A left and right border, smooth, thick, and rounded. 3. A posterior extremity, divided by a deep notch into two lobes, described by Cliabert by the name of conical cysts. 4. An anterior extremity, offering an analogous arrangement, and concealed, at first sight, by the stomachs (
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