. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Fig. 269. Stomach of llama (Colin). A, lower extremity of gullet; B, single pillar otoesophageal canal: C, superior opening of the psalter; D, reticulum; E, right oranterior water-cells; W, inferior water-cells; G, fleshy column separating the twocell groups. DIGESTION OF FOOD. 327 The reticulum, so called from the peculiar arrangement ofthe mucus membrane, is usually regarded as a receptacle forwater more especially; however, this stomach is to be regardedboth anatomically and lihysio


. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Fig. 269. Stomach of llama (Colin). A, lower extremity of gullet; B, single pillar otoesophageal canal: C, superior opening of the psalter; D, reticulum; E, right oranterior water-cells; W, inferior water-cells; G, fleshy column separating the twocell groups. DIGESTION OF FOOD. 327 The reticulum, so called from the peculiar arrangement ofthe mucus membrane, is usually regarded as a receptacle forwater more especially; however, this stomach is to be regardedboth anatomically and lihysiologically as a subdivision of thefirst, or at all events as equivalent to that. The quantity of food that it can hold in the ox is enormous,(150 to 200 pounds), a condition of things advantageous in an. Fig. 270.—Omasum and abomasum of ox cut open (Smith). A. psalterium, with open-ing between it and the reticulum at B; P. foldings (plicse) of mucous membraneat C. fourth stomach. animal feeding upon substances so poor in nutritive material inproportion to their bulk and requiring so much mastication tofit them to be acted on by the digestive juices. The reactionof tbe first two stomachs is alkaline. In the camel tribe, water cells are arranged in parallel orderin the rumen. The edges of these are provided with muscular 328 COMPARATIVE PHYSIOLOGY. fibers constituting sphincters by which their openings inwardmay be closed. These cells number several hundred, and arecapable of containing some quarts of water.


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