| 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 | |
The internal urethral orifice is the opening of the urinary bladder into the urethra. It is placed at the apex of the trigonum vesicae, in the most dependent part of the bladder, and is usually somewhat crescent-shaped; the mucous membrane immediately behind it presents a slight elevation in males, the uvula vesicae, caused by the middle lobe of the prostate.
See also
This article incorporates text in the public domain from page 1232 of the 20th edition of Gray's Anatomy (1918)
External links
- Anatomy photo:44:06-0106 at the SUNY Downstate Medical Center - "The Male Pelvis: The Urethra"