Wolffian duct

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Related to Wolffian ducts: Mullerian ducts, Müllerian ducts

mes·o·neph·ric duct

a 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.
Farlex Partner Medical Dictionary © Farlex 2012

Wolffian duct

n.
The embryonic duct of the mesonephros, which in the male becomes the vas deferens and in both sexes gives rise to the ureter.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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, paroophoron
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

mes·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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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; mesonephros
wolffian 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 duct
wolffian rest - remnants of the wolffian duct in the female genital tract that give rise to cysts. Synonym(s): mesonephric rest
wolffian ridge - one of the paired longitudinal ridges developing in the dorsal body wall of the embryo. Synonym(s): urogenital ridge
wolffian tubules - Synonym(s): Kobelt tubules
Medical Eponyms © Farlex 2012
References in periodicals archive ?
* Character 8: Ciliated cells lining the Wolffian duct: The composition of the epithelial lining of the Wolffian ducts does not include ciliated cells (state 0).
Collecting ducts that do not communicate along the length of the Wolffian ducts adjacent to the pelvic kidneys (character 1, state 1) evolved either once on the branch leading to all salamanders, excluding the Sirenidae (with secondary loss in the Proteidae; character 1, state 0), or evolved independently on the branches leading to the Cryptobranchidae + Hynobiidae and the Salamandroidea excluding the Proteidae.
Due to lack of data, the evolutionary history of ciliated Wolffian ducts could not be recovered.
However, collecting ducts that do not communicate with the Wolffian ducts along their lengths traveling adjacent to the pelvic kidney (character 1, state 1) were recovered as the ancestral state for the Cryptobranchidae + Hynobiidae and all other salamander excluding the Proteidae and Sirenidae.
Only the Plethodontidae lack a renal corpuscle (character 7, state 1) separating the vasa efferentia from the more distal epididymal ducts Too little data are available to recover ancestral state for salamanders in terms of Wolffian ducts without ciliated cells (character 8, state 0) or Wolffian ducts with ciliated cells (character 8, state 1) The branches leading to the Ambystomatidae + Dicamptodontidae + Salamandridae and Rhyacotritonidae possess Wolffian ducts with ciliated epithelial cells, whereas the branches leading to the Plethodontidee and Proteidae do not possess ciliated Wolffian ducts.
In the presence of testes, the Mullerian ducts regress and the Wolffian ducts develop into the epididymis and ductus deferens.
Testosterone, a steroid, promotes the transformation of the Wolffian ducts into the epididymis, ductus deferens, and seminal vesicles as well as development of the prostate gland along the urogenital sinus.
In the presence of ovaries, and/or absence of testes, the Wolffian ducts degenerate and the Mullerian ducts differentiate to form the oviducts, uterus, and upper vagina (Figure 4-11).
Development of male external genitalia begins soon after masculinization of the Wolffian ducts and is completed long before formation of external genitalia in females.
Cells of the Wolffian ducts do not express the 5_-reductase enzyme.
At this time, androgens stimulate the Wolffian duct system to grow and develop into epididymis, vas deferens, and seminal vesicles.
The researchers found that although the Wolffian ducts regress, the Mullerian ducts don't develop normally, leading to dramatic abnormalities in the female reproductive system.