The usually crescent-shaped opening of the urinary bladder into the urethra, placed at the anteroinferior angle (apex) of the urinary bladder trigone. [ http://www.informatics.jax.org/accession/anna MP:0011782 ]
Synonyms: ostium orificium internum internal urethral orifice of urinary bladder internal meatus of urethra ostium urethrae internum orificium urethrae internum internal urethral ostium vesicourethral orifice
Term information
- FMA:85263
- SCTID:362228001
- Wikipedia:Internal_urethral_orifice
pheno_slim
Term relations
- orifice and part of some urethra and connects some bladder lumen and connects some lumen of urethra
- urethral opening
- orifice
- mesoderm-derived structure
- part of some urethra
- connects some lumen of urethra
- connects some bladder lumen