Internal urethral orifice
The internal urethral orifice is the opening of the urinary bladder into the urethra.[1]
| Internal urethral orifice | |
|---|---|
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.
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.
See also
References
This article incorporates text in the public domain from page 1232 of the 20th edition of Gray's Anatomy (1918)
- "orifice interne de l'urèthre l.m. - Dictionnaire médical de l'Académie de Médecine". www.academie-medecine.fr. Retrieved 2024-06-01.
External links
- Anatomy photo:44:06-0106 at the SUNY Downstate Medical Center - "The Male Pelvis: The Urethra"
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