Genital tubercle
| Genital tubercle | |
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Stages in the development of the external sexual organs in the male and female.
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| Details | |
| Latin | tuberculum phallicum; tuberculum genitale |
| Precursor | somatopleure[1] |
| Gives rise to | genital swelling, mons pubis, clitoris, penis |
| Identifiers | |
| Code | TE E5.7.4.0.1.0.1 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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A genital tubercle or phallic tubercle is a body of tissue present in the development of the reproductive system. It forms in the ventral, caudal region of mammalian embryos of both sexes, and eventually develops into a primordial phallus. In the human fetus, the genital tubercle develops around week 4 of gestation, and by week 9 becomes recognizably either a clitoris or penis. This should not be confused with the sinus tubercle which is a proliferation of endoderm induced by paramesonephric ducts. Even after the phallus is developed, the term genital tubercle remains, but only as the terminal end of it,[2] which develops into either the glans penis or the glans clitoridis.
The genital tubercle is sensitive to dihydrotestosterone and rich in 5-alpha-reductase, so that the amount of fetal testosterone present after the second month is a major determinant of phallus size at birth.
See also
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ The University of North Carolina at Chapel Hill - Embryo images nr 024
External links
- Swiss embryology (from UL, UB, and UF) ugenital/genitexterne01
- Overview at mcgill.ca
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