19G 



MANUAL OF PHYSIOLOGY. 



the rest of the intestinal tract. The free surface of these cells is 

 marked by a clear margin which is composed of a row of minute 

 rods closely packed together, while the deep-seated end of the 

 cells is branched, and appears to be prolonged into the substance 

 of the villus and in some way to be connected with the support- 



FIG. 90. 



Section of Intestine of a Dog in which the bloodvessels (c) and the lac. 

 teals (d) have been injected. The blind ending or simple loop of the black 

 lacteal is seen to be surrounded by the capillary network of the bloodvessels. 

 (Cadiat.) 



ing retiforra tissue. Some of the cells are seen to swell upon the 

 addition of certain reagents, owing to their containing mucus, 

 which gives them a peculiar goblet shape ; hence they are called 

 goblet cells. These cells occur at intervals, and some observers 

 consider that they form a distinct variety of cells, differing from 



