GENITAL SYSTEM. 



479 



voluminous seminiferous cells may be distinguished, mother 

 cells, which result from the development of the primitive 

 globules ; these cells may be compared to the ovum of the 

 woman : like the ovum these former cells are set free, have 



Fig. 131. Genital system in man.* 



Fig. 132. Spermatozoids.* 



an independent existence, and move about in a liquid caused 

 by the moulting of neighboring globules ; they are gradu- 

 ally chased through the epididymis and vas deterens. Dur- 

 ing their progress these cells, called masculine ova (ovule 

 masculin, Ch. Robin), 1 undergo an active endogenous 

 segmentation, and give birth to new globular forms 

 which were contained in them: these are the spermato- 

 zoids, which are first seen as filaments rolled up in the 



1 See C. N. Demetriesco, "Etude sur les Ovules Males." 

 These de Paris, 1870. 



* T, Testicle. Ch, Corpus Highmori, with the rete testis. E, Caput Epidi- 

 dymis, formed bv the union of the seminiferous cones. E', Tail, caudn, or 

 globus of the epididymis. Va, Vas aberrans. Cc?, Vas deferens. Vs, Vesicula 

 seminalis. P, Prostate, with ejaculatory canal ; prostatic utriculus and veru 

 montanum during erection (1). 2, So-called muscle of Wilson, in a state of 

 contraction, obliterating the canal (at this moment the spermatic fluid can only 

 accumulate in the prostatic portion of the urethra between the points 1 and 2, 

 whence it is propelled by the contractions of the preceding canals from E to 

 VS). Gp, Cowper's gland. V, Bladder. 



* a, i, Spermatozoids, taken from inside of the testicle, c, From the vaa 

 defercus. a, From the vesicuhe seminales. 



