. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. THE ALIMENTARY CANAL. 89 hence it is sometimes called the water-bag. Here the food is made into little balls, and returned to the mouth to undergo a thorough mastication. When finally swal- lowed, it is directed, by a groove from the oesophagus, to the third, and smallest, cavity, the manyplies (psalterium), named from its numerous folds, which form a strainer to keep back any undivided food; and thence it passes into the true stomach (abomasus), from whic
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. THE ALIMENTARY CANAL. 89 hence it is sometimes called the water-bag. Here the food is made into little balls, and returned to the mouth to undergo a thorough mastication. When finally swal- lowed, it is directed, by a groove from the oesophagus, to the third, and smallest, cavity, the manyplies (psalterium), named from its numerous folds, which form a strainer to keep back any undivided food; and thence it passes into the true stomach (abomasus), from which, in the calf, the rennet is procured for curdling milk in the manufacture of cheese. This fourth cavity is like the human stomacli in form and function, and is the only part which secretes gastric juice. The rumen and reticu- lum are rather dilatations of the oesophagus than parts of the stomach itself; while the latter is divided by constriction into two chambers, the psalterium and abomasus, as in many other animals. In structure, the stomach re- sembles the oesophagus. The smooth outside coat (perito- neum) is a reflection of the membrane which lines the whole abdomen. The middle, or mus- cular, coat consists of three lay- ers of fibres, running length- wise around and obliquely. The successive contraction and relaxing of these fibres produce the worm-like motion of the stomach, called peristaltic. The innermost, or mucous, membrane, is soft, velvety, of a reddish-gray color in Man, and filled with multitudes of glands, which secrete the gastric juice. The human stomach, when distended, will. Fig. 57.—Vertical Section of the Coats of the Stomnch: 1, surface of mucous membrane, and mouths of gastric follicles; 2, gastric tubu- li, or follicles ; 3, dense connective tissue; 4, submucous tissue; 5, transverse muscular fibre; 6, longi- tudiual muscular fibre; T, fibrous, or serous, Please note that these images are extracted from scanned page images that may have been
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
