Genital ridge (original) (raw)
The genital ridge (or gonadal ridge) is the precursor to the gonads. The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin. Once oogonia enter this area they attempt to associate with these somatic cells. Development proceeds and the oogonia become fully surrounded by a layer of cells (pre-granulosa cells). The genital ridge appears at approximately five weeks, and gives rise to the sex cords.
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|---|---|
| dbo:abstract | Die Genitalleiste ist die Anlage der Keimdrüsen (Gonaden) bei einem Embryo. Sie ist eine beidseitige, längsverlaufende Verdickung des Epithels des Zöloms und des darunter liegenden Mesenchyms, die sich in der 4. Entwicklungswoche – am 26. Tag der Keimesentwicklung – bildet, und aus der sich in der Folge die Gonaden entwickeln. Die Genitalleisten liegen damit an der Leibeshinterwand zwischen hinterem Mesenterium und den ebenfalls beidseitig angelegten Urnierenleisten. Bei den meisten Wirbeltieren bildet nur der Mittelabschnitt dieser Anlage die Keimdrüse, der vordere und hintere Teil wird zu den Keimdrüsenbändern. In Frühstadium der Entwicklung ist es noch nicht möglich, zwischen männlicher und weiblicher Genitalentwicklung zu unterscheiden: Das Geschlecht ist bei den meisten Tieren genetisch bestimmt. Keimzellen sind in der Genitalleiste noch nicht vorhanden. Diese wandern als Urkeimzellen ab der 5. Entwicklungswoche von der Wand des Dottersackes über das Mesenterium des Enddarms Richtung Genitalleiste und erreichen diese in der 6. Entwicklungswoche. (de) The genital ridge (or gonadal ridge) is the precursor to the gonads. The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin. Once oogonia enter this area they attempt to associate with these somatic cells. Development proceeds and the oogonia become fully surrounded by a layer of cells (pre-granulosa cells). The genital ridge appears at approximately five weeks, and gives rise to the sex cords. (en) In embriologia, la cresta gonadica (o cresta genitale) è il precursore delle gonadi. (it) Em embriologia, a crista gonadal (ou crista genital) é a região precursora das gônadas. Inicialmente, a crista gonadal consiste fundamentalmente em mesênquima e células de origem mesonéfrica. Pode se diferenciar em ovário ou testículo, dependendo essencialmente do genótipo sexual do indivíduo (Tanaka 2014). Em humanos, as cristas gonadais se formam do espessamento da epiderme na superfície ventral do mesonéfro durante a quarta semana pós-fertilização. Esse processo se dá por, dentre outros, muitos fatores de transcrição da família homeobox, como: LHX1 (Shawlot 1995) e LHX9 (Birk 2000). Essas cristas são compostas de linhagens de células somáticas e células germinativas, essas duas se formando em locais e momentos embrionários diferentes durante a ontogenia do embrião (Tanaka 2014). Durante os primeiros dias embrionários, essas cristas indiferenciadas ja desenvolvem dutos sexuais, até que durante a diferenciação sexual um dos dutos é degenerado, conforme o sexo cromossômico do indivíduo (Rey 2000-). (pt) 生殖嵴是胚胎上即將發育為性腺的區域，主要由間充質以及原中腎區的細胞構成。當卵原細胞進入此區後會與體細胞交互作用，在卵原細胞的周邊圍繞一層細胞(濾泡中的前身)。 生殖嵴約會在五週左右的胚胎上發現，並進而發育為。 (zh) |
| dbo:organSystem | dbr:Reproductive_system |
| dbo:precursor | dbr:Urogenital_folds |
| dbo:thumbnail | wiki-commons:Special:FilePath/Gray1106.png?width=300 |
| dbo:wikiPageID | 4765279 (xsd:integer) |
| dbo:wikiPageLength | 5581 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1115262277 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Mesenchyme dbr:Mesonephros dbr:Anlage_(biology) dbr:DAX1 dbr:DMRT1 dbr:Development_of_the_gonads dbr:WNT4 dbr:Sex_cords dbr:Embryo dbr:WT1 dbr:Granulosa_cells dbc:Embryology_of_urogenital_system dbr:Gonads dbr:Testis-determining_factor dbr:Urogenital_folds dbr:Reproductive_system dbr:SOX9 dbr:SF1_(gene) dbr:File:Gray1110-1.png |
| dbp:caption | Section of the fold in the mesonephros of a chick embryo of the fourth day. (en) |
| dbp:givesriseto | dbr:Sex_cords |
| dbp:latin | crista gonadalis (en) |
| dbp:name | Genital ridge (en) |
| dbp:precursor | dbr:Urogenital_folds |
| dbp:system | dbr:Reproductive_system |
| dbp:wikiPageUsesTemplate | dbt:Authority_control dbt:Reflist dbt:EmbryologySwiss dbt:Development_of_urinary_and_reproductive_systems dbt:Infobox_embryology |
| dct:subject | dbc:Embryology_of_urogenital_system |
| rdf:type | owl:Thing wikidata:Q4936952 dbo:AnatomicalStructure dbo:Embryology |
| rdfs:comment | The genital ridge (or gonadal ridge) is the precursor to the gonads. The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin. Once oogonia enter this area they attempt to associate with these somatic cells. Development proceeds and the oogonia become fully surrounded by a layer of cells (pre-granulosa cells). The genital ridge appears at approximately five weeks, and gives rise to the sex cords. (en) In embriologia, la cresta gonadica (o cresta genitale) è il precursore delle gonadi. (it) 生殖嵴是胚胎上即將發育為性腺的區域，主要由間充質以及原中腎區的細胞構成。當卵原細胞進入此區後會與體細胞交互作用，在卵原細胞的周邊圍繞一層細胞(濾泡中的前身)。 生殖嵴約會在五週左右的胚胎上發現，並進而發育為。 (zh) Die Genitalleiste ist die Anlage der Keimdrüsen (Gonaden) bei einem Embryo. Sie ist eine beidseitige, längsverlaufende Verdickung des Epithels des Zöloms und des darunter liegenden Mesenchyms, die sich in der 4. Entwicklungswoche – am 26. Tag der Keimesentwicklung – bildet, und aus der sich in der Folge die Gonaden entwickeln. (de) Em embriologia, a crista gonadal (ou crista genital) é a região precursora das gônadas. Inicialmente, a crista gonadal consiste fundamentalmente em mesênquima e células de origem mesonéfrica. Pode se diferenciar em ovário ou testículo, dependendo essencialmente do genótipo sexual do indivíduo (Tanaka 2014). (pt) |
| rdfs:label | Genitalleiste (de) Genital ridge (en) Creste genitali (it) Crista gonadal (pt) 生殖嵴 (zh) |
| owl:sameAs | wikidata:Genital ridge dbpedia-de:Genital ridge dbpedia-it:Genital ridge dbpedia-pt:Genital ridge dbpedia-zh:Genital ridge https://global.dbpedia.org/id/HuBk |
| prov:wasDerivedFrom | wikipedia-en:Genital_ridge?oldid=1115262277&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/Gray1110-1.png wiki-commons:Special:FilePath/Gray1106.png |
| foaf:isPrimaryTopicOf | wikipedia-en:Genital_ridge |
| foaf:name | Genital ridge (en) crista gonadalis (en) |
| is dbo:precursor of | dbr:Sex_cords |
| is dbo:wikiPageRedirects of | dbr:Gonadal_ridge dbr:Urogenital_ridge dbr:Genital_ridges dbr:Gonadal_ridges |
| is dbo:wikiPageWikiLink of | dbr:Mesovarium dbr:Oogonium dbr:List_of_related_male_and_female_reproductive_organs dbr:Gametogenesis dbr:Gonadal_ridge dbr:Sex_cords dbr:Fallopian_tube dbr:Germ_cell_nest dbr:Germline_development dbr:Gonad dbr:Gonocyte dbr:Male_reproductive_system dbr:Mullerian_anomalies dbr:Scrotum dbr:Paramesonephric_duct dbr:Urogenital_ridge dbr:Genital_ridges dbr:Gonadal_ridges |
| is dbp:precursor of | dbr:Sex_cords |
| is foaf:primaryTopic of | wikipedia-en:Genital_ridge |
