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...
n. 1  Any of a class of compounds that consist of an ester of glycerol with three fatty acids and that are the chief constituents of fats and oils. 2  an ester obtained from glycerol by the esterification of three hydroxyl groups with fatty acids, forming much of the fats and oils stored in animal and vegetable tissues.