syncytiotrophoblast
The syncytiotrophoblast (from the Greek 'syn'- "together"; 'cytio'- "of cells"; 'tropho'- "nutrition"; 'blast'- "bud") is the epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother. It is a multinucleate, terminally differentiated syncytium, extending to 13cm.
Key facts
- Embryology.Name
- Syncytiotrophoblast
- Embryology.Latin
- syncitiotrophoblastus
- Embryology.Image
- Gray36.png
- Embryology.Caption
- Primary chorionic villi. Diagrammatic.
- Embryology.Image2
- Gray37.png
- Embryology.Caption2
- Secondary chorionic villi. Diagrammatic.
- Embryology.CarnegieStage
- 5a
- Embryology.Days
- 8
via Wikipedia infobox
Article
6 sectionsContents
- Function
- Formation
- Additional images
- See also
- References
- External links
The syncytiotrophoblast (from the Greek 'syn'- "together"; 'cytio'- "of cells"; 'tropho'- "nutrition"; 'blast'- "bud") is the epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother. It is a multinucleate, terminally differentiated syncytium, extending to 13cm.
==Function== thumb|left|Image showing trophoblast differentiated into the two layers of [[cytotrophoblast and syncytiotrophoblast during implantation]] It is the outer layer of the trophoblasts and actively invades the uterine wall, during implantation, rupturing maternal capillaries and thus establishing an interface between maternal blood and embryonic extracellular fluid, facilitating passive exchange of material between the mother and the embryo.