. Physiology, experimental and descriptive . ded into small drops by mastication and the move-ments of the stomach. For instance, in eating bread andbutter, the melting butter will be finely mixed with the breadas it is chewed. , The water in the chyme was partly taken , and partly derived from the saliva and gastric are also present ptyalin, pepsin, mucus, salts, and someindigestible substances. At intervals the sphincter muscles of the pylorus relax, and the con-tractions of the stomach send theliquid mixture into the intestinesby spurts. The Intestine. — The smallintestin
. Physiology, experimental and descriptive . ded into small drops by mastication and the move-ments of the stomach. For instance, in eating bread andbutter, the melting butter will be finely mixed with the breadas it is chewed. , The water in the chyme was partly taken , and partly derived from the saliva and gastric are also present ptyalin, pepsin, mucus, salts, and someindigestible substances. At intervals the sphincter muscles of the pylorus relax, and the con-tractions of the stomach send theliquid mixture into the intestinesby spurts. The Intestine. — The smallintestine has essentially the samestructure as the parts of the diges-tive tube already studied, namely,a mucous lining beset with an im-mense number of tubular glands,called Intestinal Glands. Thesesecrete a liquid collectively calledthe Intestinal Juice, whose exactwork is not well known, but whichmay be said to complete the workof the other secretions. The intestines have also the mus-cular coats,, about as described. And the muscular coat has. Fig. 62. Horizontal Section through the Mucous Membrane of the Intestine, showing Intestinal Glands in Transuerse Section. (Highly Magnified.) PORTAL CIRCULATION. 217 the same work of mixing the juices with the food, and ofmoving it along. Soon after the chyme enters the small intestine it haspoured upon it two liquids, which enter the intestine in onecommon stream; these are the Bile and the Pancreatic large compound glands, the Liver and Pancreas, lie closeto the stomach; their ducts join before they enter the intes-
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