Gonadal ridge
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| Gonadal ridge | ||
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| Section of the urogenital fold of a chick embryo of the fourth day. ("Genital ridge" labeled at left.) | ||
| Gray's | subject #252 1207 | |
| Gives rise to | sex cords | |
In embryology, the gonadal ridge (or genital ridge) is the precursor to the gonads.
It gives rise to the sex cords.
It appears at approximately five weeks.
[edit] External links
- Swiss embryology (from UL, UB, and UF) cgametogen/keimbahn02
| Mammalian development of embryo and development of fetus (some dates are approximate - see Carnegie stages) |
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| Week 1: Zygote - Morula - Blastula/Blastomere/Blastosphere - Archenteron/Primitive streak - Blastopore - Allantois - Trophoblast (Cytotrophoblast - Syncytiotrophoblast - Gestational sac)
Week 2: Yolk sac - Vitelline duct - Bilaminar disc Week 3: Hensen's node - Gastrula/Gastrulation - Trilaminar embryo Branchial arch (1st) - Branchial pouch - Meckel's cartilage - Somite/Somitomere - Sclerotome - Myotome - Germ layer (Ectoderm, Endoderm, Mesoderm, Chordamesoderm, Paraxial mesoderm, Intermediate mesoderm, Lateral plate mesoderm, Splanchnopleure, Somatopleure) Histogenesis and Organogenesis Uterine support: Placenta - Umbilical cord (Umbilical artery, Umbilical vein, Wharton's jelly) - Amniotic sac (Amnion, Chorion) |
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