from The Century Dictionary and Cyclopedia
- Relating to both the bladder and the urethra.
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The remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra; its apex is prolonged to the umbilicus as a narrow canal, which later is obliterated and becomes the medial umbilical ligament (urachus).
The prostate originally consists of two separate portions, each of which arises as a series of diverticular buds from the epithelial lining of the urogenital sinus and vesico-urethral part of the cloaca, between the third and fourth months.
The vesico-urethral portion absorbs the ends of the Wolffian ducts and the associated ends of the renal diverticula, and these give rise to the trigone of the bladder and part of the prostatic urethra.
After the separation of the rectum from the dorsal part of the cloaca (p. 1109), the ventral part becomes subdivided into three portions: (1) an anterior vesico-urethral portion, continuous with the allantoisinto this portion the Wolffian ducts open; (2) an intermediate narrow channel, the pelvic portion; and (3) a posterior phallic portion, closed externally by the urogenital membrane (Fig. 1118).