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...
The general structure of an ether. R and R' represent any alkyl or aryl substituent. Ethers (/ËiËÎ¸Ér/) are a class of organic compounds that contain an ether groupâan oxygen atom connected to two alkyl or aryl groups. They have the general formula RâOâRâ², where R and Râ² represent the alkyl or aryl groups.