What is another word for trophoblast?
Pronunciation: [tɹˈɒfəblˌast] (IPA) 
Trophoblast is a term used to describe the outer layer of cells in the blastocyst, which eventually develops into the placenta. There are several synonyms for this term, including syncytiotrophoblast, cytotrophoblast, and extravillous trophoblast. The syncytiotrophoblast is responsible for forming the outer layer of the placental villi, which facilitate nutrient and gas exchange between the mother and fetus. The cytotrophoblast, on the other hand, forms the inner lining of the villi and is responsible for their migration and branching. Finally, the extravillous trophoblast is involved in the invasion of the maternal uterine lining and the formation of the spiral arteries that supply blood to the placenta.
