CH. III.] 



EPITHELIUM. 



The gaps seen there are due to the formation of what are 

 called goblet cells. In some of the columnar cells, a formation 



Pig. 37. A row of columnar cells from the rabbit's intestine. Smaller cells are seen 

 between the epithelium cells ; these are lymph-corpuscles. (Schafer.) 



of granules occurs which consist of a substance called mucigen ; 

 these run together, and are discharged from the cell as a brightly 



Fig. 38. Vertical section of an intestinal villus of a cat. a, the striated basilar border 

 of the epithelium ; 6, columnar epithelium ; e, goblet cells ; d, central lymph-vessel ; 

 ', unatriped muscular fibres ; /, adenoid stroma of the villus in which are contained 

 lymph-corpuscles. (Klein.) 



refracting globule of mucin, leaving the cell with open mouth like 



Fig. 39. Goblet cell*. 



a goblet, the nucleus being surrounded by the remains of the 

 protoplasm in its narrow stem (see tig. 39). 



