CH. III.] 



CILIATED EPITHELIUM 



2? 



Ciliated Epithelium. 



The cells of ciliated epithelium are generally of columnar shape 

 (fig. 40), but they may occasionally be spheroidal (fig. 41). 



FIG. 36. Columnar epithelium cells of the rabbit's 

 intestine. 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 its attached end. The 

 striated border (sir.) is well seen, and the 

 bright disc separating it from the cell proto- 

 plasm, n, nucleus with intranuclear net- 

 work, a, a thinned-out winglike projection 

 of the cell which probably fitted between two 

 adjacent cells. (Schiifer.) 



Fm. ?S. Vertical section of an intestinal villus 

 of a cat. a, the striated border of the epi- 

 thelium ; b, columnar epithelium ; c, goblet 

 cells ; d, central lymph-vessel ; e, unstriped 

 muscular fibres; /, adenoid stroma of the 

 villus in which are contained lymph-cor- 

 puscles. (Klein.) 



FIG. 37. A row of columnar cells from the 

 rabbit's intestine. Smaller cells are seen 

 between the epithelium cells ; these are 

 lymph-corpuscles. (Schafer.) 



FIG. 39. Goblet cells. (Klein.) 



b 



FIG. 40. Ciliated epithelium from the human 

 trachea, a, large fully-formed cell ; b, 

 shorter cell ; c, developing cells with more 

 than one nucleus. (Cadiat.) 



FIG. 41. Spheroidal ciliated 

 cells from the mouth of 

 the frog, x 300 diame- 

 ters. (Sharpey.) 



