CHAPTER II. 



THE MECHANICAL PHENOMENA OF ALIMENTATION 



(Continued). 



6. The Movements of the Small Intestine. A review of 

 the literature on the movements of the intestine, both large 

 and small, may be found in the articles of GRUTZNER 1 and 

 CANNON 2 and in the section on the intestine by STARLING 3 in 

 SCHAEFER'S Text-book of Physiology, The following para- 

 graphs sum up CANNON'S conclusions on the movements of 

 the intestine as studied by the already outlined method of 

 z-ray examination of the alimentary tract after a meal mixed 

 with bismuth subnitrate. Cats fed on canned salmon or 

 bread-and-milk mush were used for experimental study. 



It is best to begin a description of the normal movements 

 of the small intestine by referring to Fig. 4, in which is shown 

 the appearance of the food in the intestine of a cat five and 

 three-quarter hours after a meal of canned salmon. The 

 animal is lying upon her back. In the middle of the plate 

 in dim outline is seen the spinal cord with the pelvis below. 

 On the right side above is the pyloric extremity of the stom- 

 ach, and below it in dark shadow several intestinal loops 

 lying over each other. In lighter outline and occupying the 

 entire abdominal cavity are other loops also filled with food. 

 The small dark shadow on the left is the caecum. 



1 GRUTZNER: Pfliiger's Archiv, 1898, LXXI, p. 51 5, 

 ? CANNON: American Journal of Physiology, 1902, VI, p. 251. 

 3 STARLING: Schaefer's Text-book of Physiology, Edinburgh and 

 London, 1900, II, p. 330. 



22* 



