Salpingitis 



433 



the ampulla, however, they increase in number and height, 

 with the formation of numerous secondary folds, so that at 

 the ampulla the otherwise broad lumen becomes almost oc- 

 cluded. At the fimbriated end, the folds widen and are con- 

 tinued out on the free ends of the fimbriae, forming ridges 

 which branch freely, giving the pavilion a more or less 

 honeycombed appearance. Not infrequently one finds the 

 folds ramifying elaborately, particularly at their bases, 

 forming cavities lined by a sort of flattened stratified epi- 

 thelium, sometimes even attaining the appearance seen in 

 Fig. 143. These cavities are also found in chronic catarrhal 



Fig 143— Normal Section of Oviduct Showing the Formation of 

 Cyst-Like Cavities by Coalescence of the Folds. 



salpingitis, but usually in greater numbers and accompanied 

 by other pathological changes. The superficial layer of the 

 epithelium consists of tall cells, most of which are ciliated, 

 though there is much difference of opinion as to the propor- 

 tion of the latter. In older animals, there are but two or 

 three layers of cells under the superficial one ; while in young 

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