Embryology of the Genital Organs Per Brodal Institutt for medisinske basalfag Universitetet i Oslo...
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Transcript of Embryology of the Genital Organs Per Brodal Institutt for medisinske basalfag Universitetet i Oslo...
![Page 1: Embryology of the Genital Organs Per Brodal Institutt for medisinske basalfag Universitetet i Oslo 9th Semester 2008.](https://reader034.fdocuments.net/reader034/viewer/2022051517/56649ed45503460f94be48fe/html5/thumbnails/1.jpg)
Embryology of the Genital Embryology of the Genital OrgansOrgans
Per BrodalPer BrodalInstitutt for medisinske basalfagInstitutt for medisinske basalfag
Universitetet i OsloUniversitetet i Oslo
9th Semester 20089th Semester 2008
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The Mesonephric Duct
Cloaca
Mesonephros
Metanephros
Mesonephric duct
Ureter bud
34 days (~ 5 weeks) 6 mm CR-length
Mesonephric excretory tubules
2P. Brodal
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Early Gonadal Development
Primordial germ cells
Yolk sac
Gonadal ridge
Coelomic cavity
Mesonephric duct
Mesonephric ridge
3P. Brodal
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Early Development of The Internal Genitals
4P. Brodal
Neural tube
Dorsal aorta
Notochord
Dorsal mesentery
Coelomic cavity
Mesonephric duct
Mesonephric tubules
Gonadal (genital) ridge
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The Gonadal Ridge
4 week embryo
Langman
Gonadal ridge Primitive sex cordsProliferating
coelomic epithelium
Mesonephric duct
6 week embryo
5P. Brodal
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Further Development - Male
Tunica Albuginea
Testis cords
6P. Brodal
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Undifferentiated stage (6 w)Mesonephric tubules
Gonadal anlage
Mesonephric duct(Wolff’s duct) ♂
Paramesonephric duct (Müller’s duct) ♀
Urogenital sinus (from the cloaca)
Primordia of accessory glands7P. Brodal Netter
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Male and Female Gonadal Development
The mesonephric duct
The paramesonephric duct
Medullary sex cords
8P. Brodal
Male Female
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The Female Genital Tract – Further Development
9P. Brodal
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Malformations of the Uterus
10P. Brodal
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Development of the Urogenital Sinus
Allantois Cloaca
Rectum
Future bladder
Definitive urogenital sinus
Defective partitioning of the cloaca results in anomalies of anorectal, urinary or genital structures; e.g rectourethral fistula or rectovaginal fistula 11P. Brodal
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Further development
12P. Brodal
Netter
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External Genitals
4 weeks 6 weeks
Genital tubercleCloacal fold
Cloacal membrane Urogenital membrane
Urogenital fold
5 months Newborn
13P. Brodal
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Hypospadia
14P. Brodal
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Descent of the Testes
Scrotum
Peritoneum
Retentio testis (kryptorchismus):
When the testes do not reach the scrotum
Inguinal hernia
when tunica vaginalis still communicates with the peritoneal cavity (processus vaginalis persists)
15P. Brodal