THE REPRODUCTIVE SYSTEM 371 



brane. The ciliary motion is toward the uterus. The stroma con- 

 sists of a cellular connective tissue, quite compact in structure in the 

 isthmus, where the folds are low, more loosely arranged in the high 

 folds of the ampulla and fimbriated extremity. 



The muscular coat consists of an inner circular and an outer longi- 

 tudinal layer. The latter is a comparatively thin layer in the isth- 

 mus, consists of discontinuous groups of muscle cells in the ampulla, 

 and in the fimbriated extremity is frequently absent. 



*'- -^^i^. 



"^■t! 



:'iy 





iM ^iS^%< 









mmsm&Sw 





Fig. 263. — Cross Section of Oviduct near Fimbriated Extremity, showing complicated 

 foldings of mucous membrane. (Orthmann.) 



The serous coat has the usual structure of peritoneum. 



The larger blood-vessels run in the stroma along the bases of the 

 folds. They send off branches which give rise to a dense capillary 

 network in the stroma. 



Of the lymphatics of the tube little is known. 



The nerves form a rich plexus in the stroma, from which branches 

 pass to the blood-vessels and muscular tissue of the walls of the tube 

 and internally as far as the epithelial lining. 



TECHNIC 



(i) Child's Ovary. — Remove the ovarj^ of a new-born child, being careful not 

 to touch the surface epithelium, fix in Zenker's fluid (technic 10, p. 8), and harden 

 in alcohol. Cut sections of the entire organ through the hilum. Stain with 

 haematoxylin-eosin (technic i, p. 20) and mount in balsam. 



(2) For the purpose of studying the Graafian follicle in the different stages of 



