Mesonephros

(redirected from mesonephric)
Also found in: Dictionary, Medical.
Related to mesonephric: metanephric, Mesonephric tubule

mesonephros

[¦mez·ə′ne‚frōs]
(embryology)
One of the middle of three pairs of embryonic renal structures in vertebrates; persists in adult fish and is replaced by the metanephros in higher forms.

Mesonephros

 

wolffian body, a paired excretory organ in vertebrates.

The mesonephros consists of numerous twisting tubules that open at one end into the body cavity and at the other into the mesonephric (wolffian) duct. Each tubule has a lateral outgrowth —the malpighian corpuscle. In fish and amphibians, the mesonephros functions throughout life; in reptiles, birds, and mammals, including man, it functions only during the early stages of embryonic development, being subsequently replaced by the metanephros. At first the metanephros is metameric in structure, but this is lost as the organism grows. In the males of higher vertebrates, most of the mesonephros becomes an appendage of the testis and, with the wolffian duct, forms the vas deferens; in the females, the mesonephros is reduced.

References in periodicals archive ?
Caution should be taken, however, because benign conditions, such as tunnel clusters, laminar endocervical hyperplasia, and mesonephric duct hyperplasia, may also show crowded, confluent growth; however, such lesions are usually circumscribed and lack the cytologic features of malignancy.
Mesonephric adenocarcinoma is a rare tumour which originates from mesonephric remnant.
Nephrogenic adenoma has also been referred to as mesonephric adenoma/metaplasia, adenomatoid tumour, and adenomatoid metaplasia [7].
Seminal vesicle cysts with unilateral renal agenesis and contralateral ureteral stenosis in a [beta]-thalassemic patient: an unknown association by incomplete development of the mesonephric duct.
Here's a sample entry: "Wolffian ducts: also called mesonephric ducts; paired ducts that develop during vertebrate development; in human males, they give rise to the vasa deferentia, and in human females, they are relatively undeveloped.
The histogenesis of AT has been a matter of debate for many years with the proposed cells of origin being endothelial, mesothelial, mesonephric, mullerian and epithelial (8).
In humans, SV development begins from the mesonephric (or Wolffian) duct at approximately 12 weeks of fetal age, and morphogenesis of the SV depends on fetal testicular androgens (Risbridger and Taylor 2006).
5 day of gestation in mice from Mesonephric endothelial cells [8,34].
It is generally accepted that the developmental origin of the EDs in rodents is the proximal mesonephric tubules (Linder, 1971; Marshall et al.
The other ends of these tubules drain into bilateral (one on each side) mesonephric ducts that empty into the cloaca, also known as the urogenital sinus.
Migration of mesonephric cells into the mammalian gonad depends on SRY.