206 NORMAL HISTOLOGY. 



covered with a layer of endothelial cells. The 

 muscular layer, composed of smooth muscle, consists 

 of an inner thick circular layer and an outer thin 

 longitudinal layer which is not continuous. The 

 mucous membrane is thrown up into numerous longi- 

 tudinal folds, so that on cross section the lumen 

 of the tube has a stellate shape. The height of these 

 folds increase as the fimbriated extremity of the 

 tube is approached ; here they are more complicated 

 owing to the secondary folds of the larger primary 

 ones. The mucous membrane consists of a base- 

 ment substance of fine connective tissue rich in cells ; 

 its free surface being covered by a single layer of 

 cylindrical, ciliated epithelium, the movement of the 

 cilia being towards the cavity of the uterus ; a thin 

 longitudinal layer of smooth muscle, the muscularis 

 mucosae ; and a loose fibrillar connective-tissue layer, 

 the submucosa, which binds it to the muscular layer. 



TECHNIQUE. 



The Fallopian tube from the human subject, or from 

 a cat or dog, is cut into small lengths and hardened 

 in Muller's fluid. After imbedding in celloidin, trans- 

 verse sections are made, stained double and mounted 

 in balsam. 



THE UTERUS. 



The walls of the uterus consist of crossing and 

 interlacing bundles of smooth muscle-cells, with a 

 small amount of connective tissue enclosing them 



