Urethral crest

Urethral crest

Upon the posterior wall of the prostatic urethra is a narrow longitudinal ridge, the urethral crest (verumontanum), formed by an elevation of the mucous membrane and its subjacent tissue. 

 In females, it is known as the crista urethralis femininae, and is a conspicuous longitudinal fold of mucosa on the posterior wall of the urethra

The urethral crest is an anatomical feature present in the urinary system of both males and females. 

In males, the urethral crest is known as the crista urethralis masculinae, or the crista phallica, and is a longitudinal fold on the posterior wall of the urethr extending from the uvula of the bladder through the prostatic urethra

length: It is from 15 to 17 mm. in length, and about 3 mm. in height, and contains muscular and erectile tissue. 

Function: When distended, it may serve to prevent the passage of the semen backward into the bladder