ABDOMEN AND PELVIS 



439 



(c) Bulbocavernous muscle (M. bulbocavernosus) (0. T. ejaculator 

 seminis or accelerator urinae). Dissect out the following 

 parts of it : 



(ca) Proper compressor of the bulb (M. compressor bulbi pro- 



prius}. 



(cb) Constrictor of root of penis (M. constrictor radicis penis). 



(cc) Compressor of the bulbar hemispheres (M. compressor 



hemisphaerium bulbi [Kobelti] ) . 



Is a M. ischiobulbosus present? Note the median tendinous 

 raphe of this muscle and the relation of the muscular fibres to it. 



FIG. 224. 



Aa. scrotales posteriores 



bidbocavernosus 



ischiocavernosus 



A. penis 



A. perinei 



Diaphragma 

 urogenitale 



M. traitsver- 

 sus perinei 

 superficialis 

 A. perinei 



circumflexa 



femoris 

 , medialis 

 Trochanter 

 major 



" '?' M. obturator internu* 

 jjr \ and Mm. gemetti 



M. piriformia 

 A. comitans n. ischiadici 



M. sphincter ani externus Lig sa crotuberosum 



M. glutaeus maximus 

 The arteries of the male perineum. (After Toldt, Anat. Atlas, Wien, 1900, 2 Aufl., p. 584, Fig. 960.) 



Arteries. (Vide Fig. 224 and Spalteholz, Fig. 473.) 



(a) Artery of perineum (A. perinei). Trace this artery forward to 



the scrotum and find 



(aa) Posterior scrotal arteries (Aa. scrotales posteriores). 

 Note the course and anastomoses of the veins accompanying the 

 arteries. 



