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The orifices of the ureters are placed at the postero-lateral angles of the trigonum vesicae, and are usually slit-like in form. In the contracted bladder they are about 2.5 cm. apart and about the same distance from the internal urethral orifice; in the distended viscus these measurements may be increased to about 5 cm. ==Additional images== File:Gray1156.png|Vertical section of bladder, penis, and urethra. File:Illu quiz bladder 01.jpg File:Ultrasound_demonstration_of_ureteral_jet_effect_0301105703_1105300.gif|Ultrasound demonstration of ureteral jet effect File:Ultrasound Scan ND 0125154513 1557120.png|Doppler ultrasound image ureteric jet effect inside urinary bladder. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orifice of ureter」の詳細全文を読む スポンサード リンク
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