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...
Definition of ALDEHYDE. : acetaldehyde; broadly: any of a class of highly reactive organic compounds that are analogous to acetaldehyde and characterized by a carbonyl group attached to a hydrogen atom. â alÂ·deÂ·hyÂ·dic \Ëal-dÉ-ËhÄ«-dik\ adjective.ADVERTISEMENT.efinition of ALDEHYDE. : acetaldehyde; broadly: any of a class of highly reactive organic compounds that are analogous to acetaldehyde and characterized by a carbonyl group attached to a hydrogen atom. â alÂ·deÂ·hyÂ·dic \Ëal-dÉ-ËhÄ«-dik\ adjective.