1998 



HIMAN ANATOMY. 



.ueo double the number in the ampulla, 

 ,v attain a much greater height as well as complexity of arrangement, the 

 m.un fddYbeing supplemented by secondary and tertiary ones so that in transverse 

 , the lumen appears almost occluded by branching villus-hke projections. The 

 surface of the mucc! is covered with a single layer of columnar epithelium (from 

 .OI5-.020 mm. in height) provided with cilia that produce a current directed from 

 mfundibulum towards the uterus, and thus, while facilitating the progress of the 

 .,l,,ng the tul*, retard the ascent of the spermatozoa. The elaborate plications 

 ami nr,-s,es within the outer part of the ampulla favor the temporary retention of the 

 sexual cells and thereby promote the chance of their meeting, fertilization usually 

 :>g place within this part of the tube. The vascular connective-tissue stroma of 



the folds, which in the 

 chief plications may 

 reach a thickness of . 2 

 mm - ' within the acces- 

 sory folds is reduced 

 to a narrow interepi- 

 thelial layer in places 

 measuring less than the 

 height of the covering 



FIG. 1695. 



MMOH 





i nm B 



cells. The tunica pro- 

 pria of the 



. .: 



Longitudinal 

 muscle 



tcr end of ampulla. X 35 



mucosa is 



directly continuous 

 with the intermuscular 

 connective tissue, and, 

 with the exception of a 

 few bundles prolonged 

 into the deepest part 

 of the mucous mem- 

 brane, does not contain 

 muscular tissue. 



The muscular coat, 

 most robust towards 

 the uterus and thinnest 

 at the infundibulum 

 (therefore the reverse 

 of the arrangement of 

 the mucosa), includes 

 an inner circular and an outer longitudinal layer of involuntary muscle. At the 

 isthmus, where the firmness of the tubal wall depends chiefly upon the muscular coat, 

 ul.ir l.i v-r is the thicker (from .5-1 mm.) and the longitudinal one repre- 

 : !)> an incomplete stratum of muscle-bundles. Towards the infundibulum, on 

 the contrary, the longitudinal layer is better developed, the circular-muscle being 

 reduced to .2 mm. or less i,, thickness. The surrounding fibrous tissue, sometimes 

 regarded as a distinct out ,,f th,- tube dnnini adventitia}, and the outer serous in- 

 vestment are only the usual connective tissue and peritoneal constituents of the broad 

 ligament, and, t -all for no further description in connection with the oviduct. 



At evidenced m pathological conditions, and especially in tubal pregnancy, the wall 



duct is capable of distention to a remarkable degree. 



Vessels. The arteries supplying the oviduct are derived from the tubal 



: uterine an.l ovarian vessels. The branch from the uterine artery 



t a. utrnn.r, passes in front of the utero-ovarian ligament to the 



v Kfoct, al,,ng the under side of which it courses outward until it 



>ranch from the ovarian artery. The latter (ramns tubarins a. 



e mesosalpmx, in front of the ovarian fimbria, towards the 



' ampul U. ui.tnbutmg branches to the fimbriated extremity, and 



mesiallv ,,* the tubal branch from the utenne. From the anastomotic branch so 



