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Organs of DigestionThe stomach is a membranous sac where the first part of the process of digestion is performed. It is placed in the upper left corner of the abdominal cavity, extending somewhat to the right of the middle of the body. The capacity of the stomach can be much varied by distension of its walls; it may be stated on the average as about three pints. The stomach is provided with a sheet of muscle whereby it can be moved so that its contents are transferred from one part to another, and thoroughly mixed with the gastric juice. The Intestines.-The portion of the alimentary canal below the stomach consists of the small and the large intestine. The former is from twenty-five to thirty feet in length, and the latter about five feet. The upper part of the intestine continues the process of digestion which was begun in the stomach ; a large part of the nutritious portion of the food is absorbed from the intestine into the blood and lymph vessels. The Liver.-This is one of the most important organs of the body, as well as one of the largest, weighing about four pounds. It is located in the upper right-hand portion of the abdominal cavity, situated under the ribs of the right side, and extending over the left of the middle line. It secretes the bile and serves as a storehouse for the starchy ingredients of the food. The Pancreas.-This body, which is also known as the sweetbread, is a long, somewhat pointed gland which lies just behind the stomach. It secretes a fluid which is an important agent in the process of digestion.
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