LIGAMENTS AND VESSELS OF THE BLADDER. 



135 



The orifices of the two ureters are at equal distances from the 

 orifices of the urethra, and form with it the angles of a triangle 

 called trigonum vesicas, (^trigone T^esicale.) That part of the 

 internal surface of the bladder which is within this triangular 

 space, is more smooth than the remainder of the same surface, 



Fig. 156.* 



day, have described a small tubercle at the lower and posterior part of the ori- 

 fice of the urethra, which resembles the uvula in form. It has not been noticed 

 here ; and M. Boyer states, that it is often scarcely perceptible. He, however, 

 makes a remark which is very worthy of attention, namely, that it is very sub- 

 ject to enlargement in old people, forming a tumor which impedes the discharge of 

 urine. Sabatier has also made the same observation. 



* A side view of the viscera of the pelvis, showing the bladder and its sur- 

 rounding parts. 1. The symphysis pubis. 2. The bladder. 3. The recto- 

 vesical fold of peritoneum, passing from the anterior surface of the rectum 

 to the posterior part of the bladder ; from the upper part of the fundus of the 

 bladder it is reflected upon the abdominal parietgs. 4. The ureter. 5. The vas 

 deferens crossing the direction of the ureter. 6. The vesicula seminalis of the 

 right side. 7, 7. The prostate gland divided by a longitudinal section. 8, 8. 

 The section of a ring of elastic tissue encircling the prostatic portion of the 

 urethra at its commencement. 9. The prostatic portion of the urethra. 10. 

 The membranous portion, enclosed by the compressor urethra; muscle. 11. The 

 commencement of the corpus spongiosum penis, the bulb. 12. The anterior 

 ligaments of the bladder formed by the reflection of the pelvic fascia, from the 

 internal surface of the os pubis to the neck of the bladder. 13. The edge of 

 the pelvic fascia at the point where it is reflected upon the rectum. 14. An 

 interval between the pelvic fascia and deep perineal fascia, occupied by a plexus 

 of veins. 15. The deep perineal fascia ; its two layers. 16. Cowper's gland 

 of the right side situated between the two layers below the membranous portion 

 of the urethra. 17. The superficial perineal fascia ascending in front of the 

 root of the penis to become continuous with the dartos of the scrotum (18.) 



