Paper - The lower ends of the wolffian ducts in a female pig embryo (1914)

From Embryology
Embryology - 1 Jun 2020    Facebook link Pinterest link Twitter link  Expand to Translate  
Google Translate - select your language from the list shown below (this will open a new external page)

العربية | català | 中文 | 中國傳統的 | français | Deutsche | עִברִית | हिंदी | bahasa Indonesia | italiano | 日本語 | 한국어 | မြန်မာ | Pilipino | Polskie | português | ਪੰਜਾਬੀ ਦੇ | Română | русский | Español | Swahili | Svensk | ไทย | Türkçe | اردو | ייִדיש | Tiếng Việt    These external translations are automated and may not be accurate. (More? About Translations)

A personal message from Dr Mark Hill (May 2020)  
Mark Hill.jpg
I have decided to take early retirement in September 2020. During the many years online I have received wonderful feedback from many readers, researchers and students interested in human embryology. I especially thank my research collaborators and contributors to the site. The good news is Embryology will remain online and I will continue my association with UNSW Australia. I look forward to updating and including the many exciting new discoveries in Embryology!

Jones FW. The lower ends of the Wolffian ducts in a female pig embryo. (1914) J Anat. Physiol. 48: 268-273. PMID 17232996

Online Editor  
Mark Hill.jpg
This historic 1914 paper by Jones is an early description of the lower ends of the Wolffian ducts in a Female pig embryo.





Modern Notes: Wolffian duct | Female | pig

Genital Links: genital | Lecture - Medicine | Lecture - Science | Lecture Movie | Medicine - Practical | primordial germ cell | meiosis | endocrine gonad‎ | Genital Movies | genital abnormalities | Assisted Reproductive Technology | puberty | Category:Genital
Female | X | X inactivation | ovary | corpus luteum | oocyte | uterus | vagina | reproductive cycles | menstrual cycle | Category:Female
Male | Y | SRY | testis | spermatozoa | ductus deferens | penis | prostate | Category:Male
Historic Embryology - Genital 
General: 1901 Urinogenital Tract | 1902 The Uro-Genital System | 1904 Ovary and Testis | 1912 Urinogenital Organ Development | 1914 External Genitalia | 1921 Urogenital Development | 1921 External Genital | 1942 Sex Cords | 1953 Germ Cells | Historic Embryology Papers | Historic Disclaimer
Female: 1904 Ovary and Testis | 1904 Hymen | 1912 Urinogenital Organ Development | 1914 External Genitalia | 1914 Female | 1921 External Genital | 1927 Female Foetus 15 cm | 1932 Postnatal Ovary
Male: 1887-88 Testis | 1904 Ovary and Testis | 1904 Leydig Cells | 1906 Testis vascular | 1909 Prostate | 1912 Prostate | 1914 External Genitalia | 1915 Cowper’s and Bartholin’s Glands | 1920 Wolffian tubules | 1935 Prepuce | 1935 Wolffian Duct | 1942 Sex Cords | 1943 Testes Descent | Historic Embryology Papers | Historic Disclaimer



Pig Links: Introduction | Estrous Cycle | 1897 Pig Embryo Development Plates | 1951 Pig Embryology | Category:Pig
  Historic Papers: 1894 Blastodermic Vesicle | 1903 12mm Pig | 1903 Pig Adrenal | 1905 Thymus | 1906 Testis | 1908 Pancreas | 1908 Pharyngeal Pouches | 1908 Intestinal Diverticula | 1910 Hypoglossal Ganglia | 1911 Prenatal Growth | 1911 Embryo 7.8 mm | 1916 Colon | 1916 Yolk Sac | 1918 Wolffian body | 1919 Corpus Luteum | 1919 Postnatal Thyroid | 1919 Placental Cord | 1921 Estrous and Implantation | 1922 Limb Arteries | 1924 Pig | 1937 Coronary Circulatory | 1938 Abnormal Brain
Historic Disclaimer - information about historic embryology pages 
Mark Hill.jpg
Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

The Lower Ends of the Wolffian Ducts in a Female Pig Embryo

By Frederic Wood Jonss, D.Sc.,

The London School of Medicine for Women.

The present communication is intended to deal-with a mere presentation of the conditions that are actually illustrated; and, like a previous communication on the External Genitalia of the Human Female (Jowr., xlviii. p. 73), is to be regarded only as an isolated study carried out as part of a wider survey of the mammalian genitalia. The sections which are illustrated were cut some ten years ago. The facts which they illustrate are by no means new, but I think it is advisable to record them as showing a definite phase in the evolution of the genital ducts in the pig. The stage recorded and illustrated is that found in foetuses of 12 centimetres rump-vertex length. The series of sections is shown in order from head to tail, and the photographs represent on the average every fifth section of the series.

In the most cephalad sections (see figs. 1 and 2) the fused Mullerian ducts have constituted a wide and patent canal (vagina, fig. 1), seen upon the dorsal side of the section, and towards the ventral side of the section is the cavity of the urethra, both chambers being surrounded by a well-defined common musculature.

Upon the ventral aspect of the fused Mullerian ducts, and embedded in their mesenchyme stroma, are the minute Wolffian ducts (W.D.).

As the sections are traced towards the caudal end, the lumen of the Mullerian ducts diminishes and becomes again bilateral by the closure of the central part of the canal (see fig. 3). After a short distance traversed in this fashion, even the bilateral Mullerian elements become reduced to solid columns of cells (see fig. 4).

Meanwhile the lumen of the Wolffian ducts is becoming increasingly large.

Still further towards the hind end the solid Miillerian columns become difficult to trace, and are closely applied to the dorsal aspects of the everenlarging Wolffian ducts (see figs. 5 and 6).

In the section represented in fig. 7, the two enlarged Wolffian ducts have met and fused in the middle line, forming a single median Wolffian chamber ; and the Miillerian elements have become still further reduced. The Lower Ends of the Wolffian Ducts in a Female Pig Embryo 269

Finally, in the section shown in fig. 8, the Wolffian chamber has opened into the urinary canal, forming a uro-genital sinus.

I think it is not unreasonable to interpret the condition shown as being a definite phase in the development of the female pig embryo, in which the Wolffian ducts are the only genital channels opening into the uro-genital sinus. In this phase the Miillerian ducts are reduced to solid epithelial cords, and the uterine cavity has no outlet into the uro-genital sinus. The single median genital opening is a Wolffian chamber into which apparently the Miillerian ducts will open when they become patent later on in foetal life. .

For the production of the microphotographs which illustrate this paper (pp. 270-273) I am indebted to the kind help and skilled assistance of the Anatomical Department of King’s College.

[Figs. 1-8. 270 Mr Frederic Wood Jones


Fig. 1. ~~ solid epithelial vagina.

Fig, 4. 272 , Mr Frederic Wood Jones

Fia, 5.


Fie. 6.

— W.D. fused.

Fia. 7.


Fic. 8.


Cite this page: Hill, M.A. (2020, June 1) Embryology Paper - The lower ends of the wolffian ducts in a female pig embryo (1914). Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Paper_-_The_lower_ends_of_the_wolffian_ducts_in_a_female_pig_embryo_(1914)

What Links Here?
© Dr Mark Hill 2020, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G