. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. NUTRITION PROPER. 313 the appearance of pea soup, and called chyme. This is passed on to the intestines, to undergo the next stage. Chemical Work; Peptonization.—The gastric juice is elaborated by the whole mucous membrane of the stomach, but especially by the peptic glands. Glands, as already explained (page 294), are a device for increasing the extent of the epithelial surface. In this case the device is of the simplest sort. The interior of the stomach is thickly strewed with d
. Outlines of the comparative physiology and morphology of animals. Anatomy, Comparative; Physiology, Comparative. NUTRITION PROPER. 313 the appearance of pea soup, and called chyme. This is passed on to the intestines, to undergo the next stage. Chemical Work; Peptonization.—The gastric juice is elaborated by the whole mucous membrane of the stomach, but especially by the peptic glands. Glands, as already explained (page 294), are a device for increasing the extent of the epithelial surface. In this case the device is of the simplest sort. The interior of the stomach is thickly strewed with deep pits lined with. Fig iqq—A, interior of stomach, showing the openings of the peptic ' glands ; B, section through the walls. epithelium (Fig. 199). Some of these pitlike tubes are branched, but only simply. The epithelial surface is thus many times greater than the interior surface of the stomach. The gastric juice is secreted mainly in these pits, both simple and branched. As soon as the food touches the stomach the mucous membrane be- comes engorged with blood and reddened, and the gas- tric secretion Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York, D. Appleton and Company
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