30 INTRODUCTION TO SEXUAL PHYSIOLOGY 



The ^ltenls or womb lies behind tlie bladder. It is the organ 

 in which the young develop during pregnancy. In man it is 

 a single bag, and the Fallopian tubes open into its upper corners 

 which may be drawn out in two horns. In most of the lower 

 mammals (mare, cow, sheep, sow, bitch, etc.) the two horns 

 or cornua uteri are of considerable dimensions and only luiite 

 posteriorly to form the corpus uteri. In the rabbit the cornua 



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Fio. 19. — Transverse section through Fallopian tube, showing folded 

 ejjithelium and muscular coat. 



are separate throughout their entire length and open into the 

 vagina through independent apertures. The virgin uterus in 

 man is about 3 inches long. The lower (posterior) part 

 is called the cervix. It is separated from the corpus by a con- 

 striction, the communication being called the internal os. The 

 lower end of the cervix projects somewhat into the vagina into 

 which it opens by the external os. 



A section across the uterus (or in the lower mammals through 

 one of its horns) shows a central cavity lined by a cubical or 

 columnar ciliated epithelium which, together with the stroma 



