FACTOID # 14: North Carolina has a larger Native American population than North Dakota, South Dakota and Montana combined.
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 


FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:



(* = Graphable)



Encyclopedia > Wolffian duct
Wolffian duct
Urogenital sinus of female human embryo of eight and a half to nine weeks old.
Transverse section of a chick embryo of forty-five hours’ incubation.
Latin d. mesonephricus, d. Wolffi
Gray's subject #252 1205
Carnegie stage 11
Precursor intermediate mesoderm
Gives rise to ureteric bud
Dorlands/Elsevier d_29/12314957

The Wolffian duct (also known as archinephric duct, Leydig's duct, mesonephric duct, or nephric duct) is a paired organ found in mammals including humans during embryogenesis. Image File history File links No higher resolution available. ... The urogenital sinus (also known as the persistent cloaca) is a part of the human body while it is an embryo. ... For other uses, see Embryo (disambiguation). ... Image File history File links Image19. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... This article does not cite any references or sources. ... This article or section is in need of attention from an expert on the subject. ... Intermediate mesoderm is a type of mesoderm that is located between the paraxial mesoderm and the lateral plate. ... This article or section is in need of attention from an expert on the subject. ... The Ureteric bud is a portion of the mesonephric duct. ... Elseviers logo. ... In biology, an organ (Latin: organum, instrument, tool) is a group of tissues that perform a specific function or group of functions. ... Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin: wise man or knowing man) in the family Hominidae (the great apes). ... Embryogenesis is the process by which the embryo is formed and develops. ...

It connects the primitive kidney Wolffian body (or mesonephros) to the cloaca and serves as the anlage for certain male reproductive organs. The mesonephros (Latin for middle kidney) is one of three excretory organs that develop in vertebrates. ... The mesonephros (Latin for middle kidney) is one of three excretory organs that develop in vertebrates. ... In zoological anatomy, a cloaca is the posterior opening that serves as the only such opening for the intestinal, urinary, and genital tracts of certain animal species. ... Anlage is a fundamental principle, or a foundation for future development. ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in an complex organism; namely: Male: penis (notably the glans penis...


Male anatomy

In a male, it develops into a system of connected organs between the testis and the prostate, namely the rete testis, the efferent ducts, the epididymis, the vas deferens, the seminal vesicle, and the prostate. The shield and spear of the Roman god Mars, which is also the alchemical symbol for iron, represents the male sex. ... Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... Rete testis is an anastomosing network of delicate tubules located in the hilum of the testicle (mediastinum testis) that carries sperm from the seminiferous tubules to the vasa efferentia. ... The efferent ducts are part of the testes and connect the rete testis with the epididymis. ... Male Anatomy The epididymis is part of the human male reproductive system and is present in all male mammals. ... The vas deferens, also called ductus deferens, (Latin: carrying-away vessel) is part of the male anatomy of some species, including humans. ... The seminal vesicles are a pair of simple tubular glands posterinferior to the urinary bladder of males. ... The prostate is a compound tubuloalveolar exocrine gland of the male mammalian reproductive system. ...

For this it is critical that the ducts are exposed to testosterone during embryogenesis. Testosterone is a steroid hormone from the androgen group. ... Embryogenesis is the process by which the embryo is formed and develops. ...

In the mature male, the function of this system is to store and mature sperm, and provide accessory semen fluid. A spermatozoon or spermatozoan ( spermatozoa), from the ancient Greek σπέρμα (seed) and (living being) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. ... Horse semen being collected for breeding purposes. ...

In both the male and the female the Wolffian duct develops in to trigonum vesicae urinariae, a part of the bladder wall. The trigone is a smooth triangular region of the internal urinary bladder formed by the two ureteral orifices and the internal urethral orifice. ...

Female anatomy

In the female, in the absence of testosterone support, the Wolffian ducts develop and wither. This article or section does not cite any references or sources. ...

As a residual the epoophoron and Skene's glands may be present. Also, lateral to the wall of the vagina a Gartner's duct or cyst could develop as a remnant. The epoophoron , also called organ of Rosenmüller, is a remnant of the Wolffian duct that can be found next to the ovary and fallopian tube. ... In human anatomy, the Skenes glands (also known as the lesser vestibular or paraurethral glands) are glands located on the upper wall of the vagina, around the lower end of the urethra. ... Gartners duct is a potential embryological remnant in human female development of the mesonephric ducts. ...


It is named after Caspar Friedrich Wolff who described the mesonephros and its ducts in his dissertation in 1759.[1] Caspar Friedrich Wolff (January 18, 1734 _ February 22, 1794) was a significant German anatomist. ... The mesonephros (Latin for middle kidney) is one of three excretory organs that develop in vertebrates. ... This article is about the thesis in dialectics and academia. ... 1759 was a common year starting on Monday (see link for calendar). ...

Additional images

See also

This article is in need of attention from an expert on the subject. ... The List of homologues of the human reproductive system shows how indifferent embryonic organs differentiate into the respective sex organs in males and females. ... In biology and medicine, virilization refers to the development of changes which make a male body different from a female body. ... Sexual differentiation is the process of development of the differences between males and females from an undifferentiated zygote (fertilized egg). ... The Müllerian ducts are paired ducts of the embryo which empty into the cloaca, and which in the female develop into the upper vagina, cervix, uterus and oviducts; in the male they disappear except for the vestigial vagina masculina and the appendix testis. ...


  1. ^ synd/2845 at Who Named It

Who Named It is a Norwegian database of several thousand eponymous medical signs and the doctors associated with their identification. ...

External links

  Results from FactBites:
Human sexual differentiation (3765 words)
Wolffian ducts are present in the embryo at a crown-rump length of 4-5 mm, and serve as the excreting duct to the mesonephros.
In the male fetus, the anterior part of the wolffian ducts communicate with the seminiferous tubules, the posterior part forms the vas deferens and the seminal vesicle.
Gonadectomy performed in male rabbit fetuses before the age of differentiation induces the degeneration of the wolffian ducts and the development of the müllerian ducts into fallopian tubes, uterus and the upper part of the vagina (24).
  More results at FactBites »



Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m