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Wolffian duct
Wolffian ductn. The embryonic duct of the mesonephros, which in the male becomes the vas deferens and in both sexes gives rise to the ureter.
[After Kaspar Friedrich Wolff.]Wolffian Duct
Wolffian duct[′wu̇l·fē·ən ′dəkt] (embryology) mesonephric duct Wolffian Duct (from the name of the naturalist K. F. Wolff), tubule of the primary or truncal kidney, the mesonephros (Wolffian body). It develops in almost all vertebrates from the rudiment growing from the head kidney, the pronepriros, to the cloaca. The Wolffian duct appears to be formed metamerically only in elasmobranch fishes. In the embryos and larvae of bony fishes and amphibians, the Wolffian duct is the excretory duct of the pronephros and mesonephros, but only of the mesonephros in sexually mature females. In male amphibians, a connection forms between the testis and Wolffian duct; the latter functions simultaneously both as a ureter and as a sperm duct. In reptiles, birds, and mammals, due to the appearance of the pelvic kidney, the metanephros with a secondary ureter, the Wolffian duct functions only in the early stages of development, after which it becomes just a sperm duct in males and degenerates in females. REFERENCEPotemkina, D. A. “O sposobe obrazovaniia vol’fova protoka u amfibii.” Dokl. AN SSSR, 1951, vol. 80, no. 2.D. A. POTEMKINA Wolffian duct
mes·o·neph·ric ducta duct in the embryo draining the mesonephric tubules in the mesonephros; in the male, it becomes the ductus deferens; in the female, it becomes vestigial.
See also: longitudinal duct of epoophoron. Synonym(s): ductus mesonephricus, wolffian ductWolffian ductn. The embryonic duct of the mesonephros, which in the male becomes the vas deferens and in both sexes gives rise to the ureter.An embryonal duct that forms from the 25–30th days of gestation in association with the rudimentary pronephros, later becoming the mesonephric excretory duct, the ‘second embryonal kidney’, giving rise to the male reproductive system—rete testis, efferent ducts, epididymis, vas deferens, seminal vesicles. In females, the lack of testosterone results in Wolffian duct regression at the 10–11th week, a portion of which remains as embryonal ‘rests’—Gartner’s duct cysts, epoophoron, Skene's glands, paroophoronmes·o·neph·ric duct (mez'ō-nef'rik dŭkt) A duct in the embryo draining the mesonephric tubules; in the male, it becomes the ductus deferens and ureter; in the female, it becomes the ureter's vestigial structures.
Synonym(s): wolffian duct. Wolffian duct the duct from the mesonephros in vertebrates. In fish and amphibia, it forms the urinary duct in females, and the urinogenital duct in males. In reptiles, birds and mammals it forms the VAS DEFERENS in males, and degenerates in females.Wolff, Kaspar F., German embryologist in Russia, 1733-1794. wolffian body - one of three excretory organs appearing in the evolution of vertebrates. Synonym(s): canal of Oken; corpus of Oken; mesonephroswolffian cyst - a cyst lying in the broad ligaments of the uterus and arising from any mesonephric structures.wolffian duct - a duct in the embryo draining the mesonephric tubules. Synonym(s): mesonephric ductwolffian rest - remnants of the wolffian duct in the female genital tract that give rise to cysts. Synonym(s): mesonephric restwolffian ridge - one of the paired longitudinal ridges developing in the dorsal body wall of the embryo. Synonym(s): urogenital ridgewolffian tubules - Synonym(s): Kobelt tubulesThesaurusSeeduct |