The cytotrophoblast, deep inside, consists in an inner irregular layer of ovoid, single- nucleus cells. This is also where intensive mitotic activity takes place. In the periphery the syncytiotrophoblast forms a syncytium, i.e., a multi-nucleic layer without cell boundaries that arises from the fusion of cytotrophoblast cells.
Define Aryl group. Aryl group synonyms, Aryl group pronunciation, Aryl group translation, English dictionary definition of Aryl group. n. A compound containing benzene or another aromatic hydrocarbon, or a univalent group derived from such a compound by removal of a hydrogen atom attached...
A chemical group present in aldehydes and ketones and consisting of a carbon atom double-bonded to an oxygen atom. carboxyl group A chemical group present in organic acids and consisting of a single carbon atom double-bonded to an oxygen atom and also bonded to a hydroxyl group. enantiomer One of two compounds that are mirror images of each other.