INTESTINAL ABSORPTION. 



203 



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 

 the neighboring cells just as the border cells of the stomach glands 

 differ from the central cells. 



The body of the villus is composed of a very delicate kind of 



FIG. 90. 



Section of Intestine of a Dog in whieh the blood vessels (c) and the lacteals (d) have 

 been injected. The blind ending or simple loop of the black lacteal is seen to be sur- 

 rounded by the capillary network of the blood vessels. (Cadiat.) 



connective tissue, forming a slender frame in which a little cage- 

 like network of blood vessels surrounds a central lacteal radicle. 

 The interstices of this connective tissue are filled with pale pro- 

 toplasmic cells, like those formed in the lymph. Under the base- 

 ment membrane forming the foundation of the epithelium are 



