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Genital ridge
Developmental precursor to the gonads in an embryo / From Wikipedia, the free encyclopedia
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In embryology, the genital ridge (genital fold or gonadal ridge) is the developmental precursor to the gonads. The genital ridge initially consists mainly of mesenchyme and cells of underlying mesonephric origin. Once oogonia [clarification needed] 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).
Quick Facts Details, Precursor ...
Genital ridge | |
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![]() Section of the fold in the mesonephros of a chick embryo of the fourth day. (Genital ridge labeled at left.) | |
Details | |
Precursor | Urogenital folds |
Gives rise to | Sex cords |
System | Reproductive system |
Identifiers | |
Latin | crista gonadalis |
TE | ridge_by_E5.7.1.0.0.0.5 E5.7.1.0.0.0.5 |
Anatomical terminology |
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The genital ridge appears at approximately five weeks, and gives rise to the sex cords.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/Gray1110-1.png/640px-Gray1110-1.png)
* 3. Ureter.
* 4. Urinary bladder.
* 5. Urachus.
* cl. Cloaca.
* cp. Elevation which becomes clitoris or penis.
* i. Lower part of the intestine.
* ls. Fold of integument from which the labia majora or scrotum are formed.
* m, m. Right and left Müllerian ducts uniting together and running with the Wolffian ducts in gc, the genital cord.
* ot. The genital ridge from which either the ovary or testis is formed (upper right).
* ug. Sinus urogenitalis.
* W. Left Wolffian body.
* w, w. Right and left Wolffian ducts.