Terminal bar is a histological term given to the unresolved group of junctional complexes that attach adjacent epithelial cells on their lateral surfaces: the zonula occludens, zonula adherens, macula adherens and macula communicans. Using light microscopy, the terminal bar appears as a bar or spot at the apical surface of the cell, wherein the structures listed cannot be resolved. With electron microscopy, it can be visually disseminated into these structures.