Endocrine - Gonad Development: Difference between revisions

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==Introduction==
==Introduction==
[[File:XXhpgaxis.gif|thumb|Female HPG axis]]
[[File:XXhpgaxis.gif|thumb|Female HPG axis]]
Note this section of notes refers to the development of the gonad as an endocrine organ. A detailed description of the gonad development is covered in [[Ovary Development]] and [[Testis Development]].
The term gonad refers to both the female [[Ovary Development|ovary]] and the male [[Testis Development|testis]]. This section of notes refers only to the development of the gonad as an endocrine organ. A detailed description of the gonad development is covered in both [[Ovary Development]] and [[Testis Development]].


Embryonically, initial endocrine development of the testis is required for development of both the internal genital tract and the external genitalia.  
Embryonically, initial endocrine development of the testis is required for development of both the internal genital tract and the external genitalia.  
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Postnatally, the gonads are part of an integrated '''H'''ypothalamus-'''P'''ituitary-'''G'''onad (HPG) axis.
Postnatally, the gonads are part of an integrated '''H'''ypothalamus-'''P'''ituitary-'''G'''onad (HPG) axis.


{{Template:Endocrine Links}} | [[2009_Lecture_16|Lecture - Genital Development]] | [http://embryology.med.unsw.edu.au/Notes/endocrine15.htm original page]
{{Template:Endocrine Links}} | [[2009_Lecture_16|Lecture - Genital Development]]


HPG Axis - [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=endocrin&part=A972&rendertype=box&id=A1057 Endocrinology - Simplified diagram of the actions of gonadotrophins]
HPG Axis - [http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=endocrin&part=A972&rendertype=box&id=A1057 Endocrinology - Simplified diagram of the actions of gonadotrophins]
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==Additional Images==
==Additional Images==
===Adult Histology===
<gallery>
</gallery>


==Terms==
==Terms==

Revision as of 10:09, 23 February 2011

Notice - Mark Hill
Currently this page is only a template and will be updated (this notice removed when completed).

Introduction

Female HPG axis

The term gonad refers to both the female ovary and the male testis. This section of notes refers only to the development of the gonad as an endocrine organ. A detailed description of the gonad development is covered in both Ovary Development and Testis Development.

Embryonically, initial endocrine development of the testis is required for development of both the internal genital tract and the external genitalia.

Postnatally, the gonads are part of an integrated Hypothalamus-Pituitary-Gonad (HPG) axis.

Endocrine Links: Introduction | BGD Lecture | Science Lecture | Lecture Movie | pineal | hypothalamus‎ | pituitary | thyroid | parathyroid | thymus | pancreas | adrenal | endocrine gonad‎ | endocrine placenta | other tissues | Stage 22 | endocrine abnormalities | Hormones | Category:Endocrine
Historic Embryology - Endocrine  
1903 Islets of Langerhans | 1903 Pig Adrenal | 1904 interstitial Cells | 1908 Pancreas Different Species | 1908 Pituitary | 1908 Pituitary histology | 1911 Rathke's pouch | 1912 Suprarenal Bodies | 1914 Suprarenal Organs | 1915 Pharynx | 1916 Thyroid | 1918 Rabbit Hypophysis | 1920 Adrenal | 1935 Mammalian Hypophysis | 1926 Human Hypophysis | 1927 Adrenal | 1927 Hypophyseal fossa | 1930 Adrenal | 1932 Pineal Gland and Cysts | 1935 Hypophysis | 1935 Pineal | 1937 Pineal | 1935 Parathyroid | 1940 Adrenal | 1941 Thyroid | 1950 Thyroid Parathyroid Thymus | 1957 Adrenal

| Lecture - Genital Development

HPG Axis - Endocrinology - Simplified diagram of the actions of gonadotrophins

Gonad Development

  • mesoderm - mesothelium and underlying mesenchyme, primordial germ cells
  • Gonadal ridge - mesothelium thickening, medial mesonephros
  • Primordial Germ cells - yolk sac, to mesentery of hindgut, to genital ridge of developing kidney

Differentiation

  • testis-determining factor (TDF) from Y chromosome: presence (testes), absence (ovaries)

Testis

  • 8 Weeks, mesenchyme, interstitial cells (of Leydig) secrete testosterone, androstenedione
  • 8 to 12 Weeks - hCG stimulates testosterone production
  • Sustentacular cells - produce anti-mullerian hormone to puberty

Ovary

  • X chromosome genes regulate ovary development

Steroidogenesis

Steroidogenesis

Adult Histology

References


Reviews

Articles

Search PubMed

Search Pubmed: endocrine gonad development

Additional Images

Terms

Glossary Links

Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link

Cite this page: Hill, M.A. (2024, March 28) Embryology Endocrine - Gonad Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Endocrine_-_Gonad_Development

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G