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...
Carboxylic Acid Definition - What does Carboxylic Acid mean? Carboxylic acid is a type of organic compound that widely occurs in forms of acetic acid and amino acids, and is the main ingredient in vinegar. It is usually linked with extra functional groups. A typical carboxylic acid has around 10 carbon atoms, a low melting point, is in liquid form and possess an unpleasant smell.