EPITHELIUM. 



[CH. III. 



The nucleus with its usual network and the vacuolated con- 

 dition of the protoplasm are very well seen. The attached border 

 is narrower than the free edge. Amoeboid lymph cells are found 



Fig. 35. Section of human thyroid ; the few vesicles shown are lined by cubical epithe- 

 lium, and contain a colloid material. (After Schafer.) 



in the spaces that must necessarily be left when cells of such 

 a shape cover a surface. Fig. 37 shows a row of columnar cells 

 from the rabbit's intestine. 



The next figure (fig. 38) shows the arrangement of these cells 



Fig. 36. Columnar epithelium cells of the rabbit's intestines. The cells have been isolated 

 after maceration in very weak chromic acid. The cells are much vacuolated, and one 

 of them has a fat globule near ite attached end. The striated border (sir.) is well 

 seen, and the bright disc separating it from the cell protoplasm, n, nucleus with 

 intranuclear network, a, a thinned out winglike projection of the cell which probably 

 fitted between two adjacent cells. (Schafer.) 



on the surface of a villus, one of the numerous little projections 

 found in the small intestine. 



