REPRODUCTIVE ORGANS IN THE FEMALE. 315 



one is particularly long and attached to the upper 

 end of the ovary. 



Structure. The Fallopian duct is a muscular tube 

 lined the whole length by a mucous membrane 

 clothed with simple ciliated columnar epithelium. 

 This mucous membrane is thrown up into longitudi- 

 nal folds that are very broad and numerous in the 

 wide portions of the tube and in the narrow portions 

 less conspicuous. It is continuous on the one hand 



Longitudinal muscle. 

 Circular muscle. 



Ciliated epithelium. 



Fig. 229. Cross section of isthmus of Fallopian tube. 



with the mucous membrane of the uterus, and at the 

 other end of the tube with the serous lining of the 

 peritoneum, being one example of a direct conti- 

 nuity of a mucous and a serous membrane. Glands, 

 so numerous in the mucous membrane of the uterus, 

 are absent in the Fallopian tube. 



The mucosa rests upon a thin vascular submucosa 

 composed of areolar tissue. External to the sub- 

 mucosa there is a muscular coat consisting of a thick 

 inner circular layer and a thin outer longitudinal 



