Tacciuoli M, Lotti T, de Matteis A, Laurenti C
Eur Urol. 1975;1(6):282-6.
The development of the muscular tissue of the ureter, ureterovesical junction and vesical trigone in the human fetus has been investigated using serial histological sections. The muscular tissue firstly appears in the lumbar tract of the ureter and the further smooth muscle development occurs in a cranio-caudal direction. The muscular tissue in the intravesical portion of the ureter is present only in fetuses between 22 and 24 weeks. The development of the muscular tissue of the trigone is dependent upon the development of smooth muscle of this tract.
利用连续组织学切片对人类胎儿输尿管、输尿管膀胱连接部和膀胱三角区的肌肉组织发育进行了研究。肌肉组织首先出现在输尿管的腰段，随后平滑肌向头尾方向进一步发育。输尿管膀胱内部分的肌肉组织仅存在于22至24周的胎儿中。三角区肌肉组织的发育取决于该段平滑肌的发育。
