Principal excretory organ during early human embryonic life
Mesonephros
Reconstruction of a human embryo of 17 mm. (Label for Mesonephros is at center right.)
Details
Carnegie stage
14
Days
22
Precursor
Intermediate mesoderm
Identifiers
Latin
mesonephros
MeSH
D008650
TE
E5.6.2.0.0.0.1
FMA
72171
Anatomical terminology
[edit on Wikidata]
The mesonephros (Greek: middle kidney) is one of three excretory organs that develop in vertebrates. It serves as the main excretory organ of aquatic vertebrates and as a temporary kidney in reptiles, birds, and mammals. The mesonephros is included in the Wolffian body after Caspar Friedrich Wolff who described it in 1759. (The Wolffian body is composed of: mesonephros + paramesonephrotic blastema)
The mesonephros is included in the Wolffian body after Caspar Friedrich Wolff who described it in 1759. (The Wolffian body is composed of: mesonephros +...
to form a glomerulus. The tubules collectively constitute the mesonephros. The mesonephros persists and form the permanent kidneys in fish and amphibians...
These embryonic structures are on either side: the pronephros, the mesonephros and the metanephros of the kidney, and the Wolffian and Müllerian ducts...
system, named pronephros, mesonephros and metanephros respectively (anamniote embryos form only a pronephros and mesonephros). The intermediate mesoderm...
development of a more advanced kidney: the archinephros, pronephros, mesonephros, and metanephros. The pronephros is the most immature form of kidney...
different kidney systems form in the developing embryo: the pronephros, the mesonephros and the metanephros. Only the metanephros develops into the permanent...
the mesonephros and gonadal ridge are continuous, but as the embryo grows the gonadal ridge gradually becomes pinched off from the mesonephros. However...
mesovarium; rather, it is covered by germinal epithelium. At first, the mesonephros and genital ridge are suspended by a common mesentery, but as the embryo...
anatomy, and botany. He was the discoverer of the primitive kidneys (mesonephros), or "Wolffian bodies" and its excretory ducts. He described these in...
urogenital system. The mesonephric duct connects the primitive kidney, the mesonephros, to the cloaca. It also serves as the primordium for male urogenital...
It is succeeded by the mesonephros, which in fish and amphibians remains as the adult kidney. In amniotes, the mesonephros is the embryonic kidney and...
wall of the embryonic aorta within the (midgestational) aorta-gonad-mesonephros region, through a process known as endothelial-to-hematopoietic transition...
vertebrates, the mesonephros persists into the adult, albeit usually fused with the more advanced metanephros; only in amniotes is the mesonephros restricted...
diverticulum from its hinder end. A large part of the head end of the mesonephros atrophies and disappears; of the remainder the anterior tubules form...
peritoneum, and each is attached by a peritoneal fold, the mesorchium, to the mesonephros. mesentery mesovarium Mesorchium is the fibrous sheath which attaches...
tissue from which in amniotes both mesonephros and metanephros come.” Some accounts call opisthonephros the ‘mesonephros’, but the opisthonephros in anamniotes...
as the 'broad ligament'. The suspensory ligament originates from the mesonephros, which, in turn, originates from intermediate mesoderm. The prenatal...
not seen initially. Maturation continues as the medial aspect of each mesonephros grows to form the genital ridge. The genital ridge continues to grow...
that causes differentiation of primordial germ cells. In males, the mesonephros releases retinoic acid. RA then goes to the gonad causing an enzyme called...
of the intermediate mesoderm. At five to six weeks of gestation, the mesonephros differentiates into a tissue known as the genital ridge. The genital...
the embryo, the epididymis develops from tissue that once formed the mesonephros, a primitive kidney found in many aquatic vertebrates. Persistence of...
glass mat, a technology used in some models of VRLA battery Aorta-gonad-mesonephros, a part of chicken, mouse, and human embryos Arithmetic–geometric mean...
a region of mesenchyme arising from, and running parallel with, the mesonephros. The paramesonephric ducts are formed by the craniocaudal invagination...
studies suggest that retinoic acid derived from the primitive kidney (mesonephros) stimulates meiosis in embryonic ovarian oogonia and that tissues of...
Upadhyay S, Zamboni L (1982). "Preliminary observations on the role of the mesonephros in the development of the adrenal cortex". Anat Rec. 202 (1): 105–111...