Tejedo-Mateu A, Vilanova-Triás J, Ruano-Gil D
Eur Urol. 1975;1(1):41-5.
Ten human embryos ranging from 10 to 20 mm in vertex-coccyx length (Horizons XVI and XVII Streeter) aged between 33 +/- 1 and 39 +/- 1 days, were studied in order to interpret the mechanism which determines the displacement of the ureter from the dorsal part of the Wolffian duct toward the lateral wall of the bladder. We demonstrated that this movement occurs due to the fact that the duct common to the ureter and the Wolffian duct undergoes a process of internal rotation before it is absorbed by the urogenital sinus. This determines that the ureteral orifice enter the urogenital sinus laterally with respect to the Wolffian duct. This absorption indicates that the mucosa of the trigone is of mesoblastic origin and the remainder of the besical of endoblastic origin. The origin of the muscular apparatus of the detrusor is entirely mesoblastic.
研究了10例顶臀长在10至20毫米之间（斯特里特第16和17期）、年龄在33±1天至39±1天之间的人类胚胎，以阐释决定输尿管从沃尔夫管背侧部分向膀胱侧壁移位的机制。我们证明，这种移位的发生是因为输尿管和沃尔夫管的共同管道在被泌尿生殖窦吸收之前经历了内旋过程。这决定了输尿管口相对于沃尔夫管从侧面进入泌尿生殖窦。这种吸收表明，膀胱三角区的黏膜起源于中胚层，膀胱其余部分起源于内胚层。逼尿肌的肌肉组织完全起源于中胚层。
