Human physiology . alimentary canal. Cannon found that the foodwas divided into many little segments in the small intestine,owing to the rhythmic repetition of the pendular segmentation of the food in a coil is repeated by the fusionand redivision of adjacent segments, in a continuous process, sothat the churning-up of the chyme is actively promoted. In thecat the rate of division into segments is about 30 divisions perminute. From time to time a peristaltic wave drives the particlesforward, on which the process of segmentation recommences. Whenthe animals are made to react to p
Human physiology . alimentary canal. Cannon found that the foodwas divided into many little segments in the small intestine,owing to the rhythmic repetition of the pendular segmentation of the food in a coil is repeated by the fusionand redivision of adjacent segments, in a continuous process, sothat the churning-up of the chyme is actively promoted. In thecat the rate of division into segments is about 30 divisions perminute. From time to time a peristaltic wave drives the particlesforward, on which the process of segmentation recommences. Whenthe animals are made to react to painful stimuli, the intestinalmovements cease. During sleep, on the contrary, they continue. IV DIGESTION IN THE INTESTINE 247 These elegant experiments have been controlled and confirmedby other workers, particularly by Wolff (1901-2) and Carvallo(1907). The latter, at the Marey Institut in Paris, made someinteresting kinematographs of the progress of the food, from thestomach through the intestines, in the S FIG. 83.—Schema to show distribution of sympathetic and vagus in gastro-intestinal tube andadjoining glands, in man ; applicable to a large extent to the dog, on which the experi-ments on the innervation of the intestine were carried out. (Luciani.) .S, stomach; D,duodenum ; /, jejunum ; T, ilium ; O, large intestine ; F, liver; M, spleen ; P, pancreas;R, kidney ; Cs, suprarenal capsule. Is, left vagus, which—after traversing the —divides into numerous branches that are distributed to the ventral surface, and along thesmall curvature of the , giving off an important branch to the liver. Id, right vaguspenetrating the dorsal wall of the abdominal cavity, behind the peritoneum, with branches tothe posterior surface and great curvature of the stomach, with one or two fibres to the pancreas ;these unite at the solar plexus (), and send branches to the intestine which pass throughthe superior mesenteric plexus (.l/.s), and follow the course
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
