^ig- 153- Frontal Section through Male Pelvis. Levator Ani Muscle. 



Frozen section. Through the body of a Male of middle age a section lias been 

 made almost parallel with the pelvic axis, so that the plane of section is not 



accurately frontal. 



This figure is intended to complete the series Figs. 151 and 152; only a 

 short description is necessary. 



The Bladder B with its overlying peritoneum is, in front of the plane of 

 section, visible above the black hnes which dehneate the peritoneum. 



All other structures except the Rectum and the folds of the buttocks and 

 parts of the thigh lie in a frontal plane, i. e. lower part of the Bladder, Ampullae 

 of Vasa Deferentia, external to these (cf. Fig. 151) the Seminal Vesicles and 

 directly below the last mentioned the Rectal Wall. 



Very instructive is the divided Obturator Internus Muscle, which can be 

 felt bulging on examination of the Female Pelvis, and especially the direction of 

 the Levator Ani which arises at the upper border of the Obturator Internus from 

 the White line and approaches the Rectum in a funnel-shaped manner to sur- 

 round it and terminate in the External Anal Sphincter. This muscle may be con- 

 sidered to consist of many parts. At the commencement of the funnel it is 

 markedly thickened (Constrictor of the Vagina). 



Near the Obturator Internus Muscle are situated the Internal Pudic Vessels 

 and Nerve (cf. Fig. 154) covered by Fascia (not seen in the figure). On either 

 side of the Rectum are seen the Ischio-Rectal Fossae filled with fat. 



The last part of the Rectum onl}' as it runs obliquely downwards and 

 backwards has been cut through; the upper part lies in front of the plane of 

 section as viewed from behind. 



