Dorlands/Elsevier o_09/12602099 | FMA 85264 | |
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Latin ostium urethrae internum TA A08.3.01.028FA08.3.01.027M |
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.
References
Internal urethral orifice Wikipedia(Text) CC BY-SA