wolffian duct


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Related to wolffian duct: urogenital sinus

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.

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.

wolffian duct

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

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.

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; 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

wolffian

named for Kaspar Friedrich Wolff, German anatomist and embryologist 1733-1794.

wolffian body
mesonephros.
wolffian duct
see mesonephric duct.
References in periodicals archive ?
This duct is connected to the Wolffian duct by a thin mesentery and is encompassed by 1-2 layers of collagenous fibers (Fig.
The Wolffian duct is only responsible for the transportation of sperm from the testes to the cloaca, as 7-8 collecting ducts that do not communicate with the Wolffian duct drain the nephrons of the pelvic kidney.
Character 1: Collecting duct morphology: The collecting ducts of the kidney exit the kidney laterally and communicate with the Wolffian duct individually along the entire length of the Wolffian duct that runs adjacent to the pelvic kidney (state 0).
We concluded that state 0 was the state possessed by the ancestor to salamanders, as collecting ducts that anastomose before communication with the Wolffian duct or cloaca have never been described in Gymnophiona (Wake, 1970) or Anura (Bhaduri, 1953; Bhaduri and Basu, 1957).
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.
The pathologic causes include retrograde ejaculation, failure of emission and alterations in the Wolffian duct structures (seminal vesicles, ejaculatory ducts and vas deferens).
As development proceeds, the embryo establishes its sex, and either the Mullerian or Wolffian ducts regress.
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.
Initially both male and female embryos have wolffian ducts and mullerian ducts.