v GENERATIVE SYSTEM OF THE FEMALE 175 



towards the uterus ; it is rich in blood-vessels and lymphatics, and 

 devoid of glands. 



Like ovulation, menstruation is also a periodic phenomenon 



FIG. 61. Form of uterine cavity at different stages. Somewhat reduced in size. (F. Ouyon.) A, 

 of virgin of 17 years of age ; B, of woman of 42 years of age, nullipara ; C, of woman of 35 years 

 of age who has borne children, b, cavity of body ; c, cavity of cervix ; the palmate folds are 

 seen ; i, isthmus and internal uterine orifice ; o, external uterine orifice ; t, superior external 

 angle of uterine cavity and uterine orifice of tube. 



Fio. 62. Right uterine tube, open throughout its length, with uterus and ovary, from a multi- 

 para. The tube has been reduced, and the preparation is seen from the front. (Richard.) 1, 

 uterine cavity; 2, uterine orifice of tube; 3, uterine wall; 4, isthmus; 5, ampulla, and 6, 

 infundibulum of tube with folds ; 7, ovarian liinbria ; 8, ovary ; 9, hilus of ovary ; 10, round 

 ligament. 



which normally recurs every lunar month (twenty-eight days). 

 Most women, according to Strahl, menstruate at the first quarter 

 of the moon, very few at the time of full moon or new moon. The 

 phenomenon of the menstrual flux is observed also in the mammals, 



