URINARY BLADDER. 



593 



Fig. 176." 



muscles, upon the sides of the base of the bladder. The umbilical 

 ligaments are the fibrous cords which result from the obliteration of the 

 umbilical arteries of the foetus ; they pass forwards on each side of the 

 fundus of the bladder, and ascend beneath the peritoneum to the umbi- 

 licus. The urachus is a small fibrous cord formed by the obliteration of 

 a tubular canal existing in the embryo : it is attached to the apex of the 



* A side view of the viscera of the male pelvis in situ. The right side of the 

 pelvis has been removed by a vertical section made through the os pubis near 

 the symphysis ; and another through the middle of the sacrum. 1. The di- 

 vided surface of the os pubis. 2. The divided surface of the sacrum. 3. The 

 body of the bladder. 4. Its fundus ; from the apex is seen passing upwards the 

 urachus. 5. The base of the bladder. 6. The ureter. 7. The neck of the 

 bladder. 5, 8. The pelvic fascia; the fibres immediately above 7 are given off 

 from the pelvic fascia and represent the anterior ligaments of the bladder, p. 

 The prostate gland. 10. The membranous portion of the urethra, between the 

 two layers of the deep perineal fascia. 1 1 . The deep perineal fascia formed of 

 two layers. 12. One of Cowper's glands between the two layers of deep peri- 

 neal fascia, and beneath the membranous portion of the urethra. 13. The bulb 

 of the corpus spongiosum. 14. The body of the corpus spongiosum. 15. The 

 right cms penis. 16. The upper part of the first portion of the rectum. 17. 

 The recto- vesical fold of peritoneum. 18. The second portion of the rectum. 

 19. The right vesicula seminalis, 20. The vas deferens. 21. The rectum 

 covered by the descending layer of the pelvic fascia, just as it is making its 

 bend backwards to constitute the third portion. 22. A part of the levator ani 

 muscle investing the lower part of the rectum. 23. The external sphincter ani. 

 24. The interval between the deep and superficial perineal fascia : they are seen 

 to be continuous beneath the figure. 



2 Q 



