Internal urethral orifice

This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please help to improve this article by introducing more precise citations. (May 2015) (Learn how and when to remove this template message)

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 [edit on Wikidata]

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[]

• Internal sphincter muscle of urethra

References[]

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"

This article related to the genitourinary system is a stub. You can help Wikipedia by .

• v
• t