194 



STUDENTS HISTOLOGY 



ment of the deep cells, (c) The elongated form of the cells 

 generally, (d) The more flattened surface cells, (e) The out- 

 line of the last, as seen in the detached specimens. (/) The deeper 

 cells present tapering prolongations, generally at one end only, 



FIG. 122. SECTION OF THE URETER NEAR THE PELVIS OF THE KIDNEY. STAINED 



WITH ILEMATOXYLIN AND EOSIN (X400). 



A. Rich capillary plexus of the mucosa. 



B. Internal muscular coat. 



C. External muscular coat. 



D. Large vessels of the areolar adventitia. 



E. Deep layer of somewhat cubical cells. 



F. "Tailed cells" of the middle epithelial layers. 



G. Surface cells in profile. 

 H. Detached surface cells. 



and are hence called "tailed cells." They may be confounded with 

 similarly shaped cells from the bladder. 



THE URINARY BLADDER. 



The layers of the bladder are mucous, muscular, and fibrous, 

 while part of it has a serous covering derived from the peritoneum. 

 The muscle is unstriated, and is arranged in inner and outer longi- 



