THE PELVIS. 



291 



and side of the coccyx. It separates two intermuscular cellular spaces (i) one 

 between itself and the pyriformis, and (2) one between itself and the levator ani. 

 (Figs. 199 and 200.) Its nerve- supply comes from the coccygeal plexus. 



The levator ani (Fig. 200) arises from the back of the pubic bone and from 

 the inner surface of the ischial spine. Between these two points it arises from 

 the white line. The muscle has a triple insertion : (i) Into the tip of the coccyx ; 

 (2) into the central point of the perineum ; (3) into the rectum. In the female 

 the anterior fibres are inserted into the side of the vagina. Function : It draws 

 the coccyx forward, elevates the floor of the pelvis, and aids in compressing the 

 pelvic viscera. 



The pelvic white line is formed by a delamination of the obturator fascia. 

 It extends from the spine of the ischium to the pubic bone. (Fig. 200.) It 

 gives partial origin to the levator ani muscle. 



FEMALE GENERATIVE ORGANS. 



Now thoroughly cleanse the pelvis and study the internal organs of genera- 

 tion of the female as follows : 



1 . Observe in front of the uterus, the bladder, partially covered by perito- 

 neum. In front of the bladder you will see a cellular space called Retzius' 

 space. 



2. Pull the uterus to one side and study the relation of the following struc- 



AMPUUA OF FALLOPIAN TUBE 



FALLOPIAN TUBE 



EXTERNAL ANGLE OF UTERUS 



FIMBRIATED EXTREMITY OF TUBE Hound ligament 



FIMBRIA OVARIOA Ligament of ovary 



Anterior peritoneal lamina 



FIG. 201. THE BROAD LIGAMENT AND ITS CONTENTS, SEKN KROM THE FRONT. (After Sappey). 



tures : (i) The round ligament of the uterus; (2) the ligament of tJic ovary; 

 (3) the Fallopian tube, or oviduct. 



As you pull the uterus to the opposite side, you will notice these three 

 structures dispersing to different parts from the angle of the uterus. Trace 

 them out, remembering they are all between the two layers of the broad liga- 

 ment (Fig. 201), as follows : (i) The round ligament to the internal abdominal 

 ring, on the outer side of the deep epigastric artery, down through the inguinal 



