Internal urethral orifice
Opening of the urinary bladder
From Wikipedia, the free encyclopedia
The internal urethral orifice is the opening of the urinary bladder into the urethra.[1]
| Internal urethral orifice | |
|---|---|
Male urinary bladder | |
 The interior of bladder. | |
| Details | |
| Identifiers | |
| Latin | ostium urethrae internum |
| TA98 | A08.3.01.028F A08.3.01.027M |
| TA2 | 3424 |
| FMA | 85264 |
| Anatomical terminology | |
Anatomy
It is usually somewhat crescent-shaped.[citation needed]
Relations
It is formed by the neck of the urinary bladder. It opens at the apex/inferior angle of the trigone of the bladder, some 2-3 cm anteromedial to either ureteral orifice.[1]
The mucous membrane immediately posterior to it presents a slight elevation in males - the uvula vesicae - caused by the middle lobe of the prostate.[citation needed]
