206 



MANUAL OF PHYSIOLOGY. 



operation, while at the same time the normal flow of lymph 

 toward the thoracic duct is more or less prevented. 



Any part which has only the protection of a single layer of 

 epithelial cells well supplied with superficial blood vessels has 

 also a supply of absorbent vessels, and therefore is capable of 

 absorbing materials in solution which are in contact with the 



FIG. 93. 



Section through the Intestinal Wall in the neighborhood of the grouped lymph folli- 

 cles (/) (Peyer's patch), showing the upper narrow (6) and the deep wide (c) lymphatic 

 plexuses. 



surface, and large quantities of fluids and solutions of various 

 materials are absorbed from the stomach and large intestine 

 partly, no doubt, by means of the lacteals or lymphatics, and 

 partly by the minute blood vessels themselves. 



However, the small intestine seems to be the part of the ali- 



