part of part of contributes to morphology of orifice fundus of urinary bladder ureterovesical junction urethral opening ureteral orifice ureteral opening ureteric orifice The slit-like opening of either ureter into the bladder; normally, the two ureteral orifices are placed at the posterolateral angles of the urinary bladder trigone while the internal urethral orifice is placed at its anteroinferior angle (apex); wide gaping usually indicates vesicoureteral reflux. FMA:77047 NCIT:C12337 ureteral meatus ureterovesical orifice UBERON:0012303 Mercier's bar Wikipedia:Orifice_of_ureter orifice of ureter ureteric ostium SCTID:181415004