endothelial cell From FMA: 9.07.2001: Endothelial cell has always been classified as a kind of epithelial cell, specifically a squamous cell but that is not true. First, endothelial cell can either be squamous or cuboidal (e.g. high-endothelial cell) and secondly, it has different embryological derivation (mesodermal) than a true epithelial cell (ectodermal and endodermal). The basis for present classification is the fact that it comprises the outermost layer or lining of anatomical structures (location-based) but a better structural basis for the differentia is the cytoskeleton of the cell. Endothelial cell has vimentin filaments while an epithelial cell has keratin filaments. [Onard]. BTO:0001176 FMA:66772 cell CALOHA:TS-0278 endotheliocyte An endothelial cell comprises the outermost layer or lining of anatomical structures and can be squamous or cuboidal. In mammals, endothelial cell has vimentin filaments and is derived from the mesoderm. lining cell meso-epithelial cell