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| internal urethral orifice ： ウィキペディア英語版 |
internal urethral orifice
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
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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