has part has part has_part only in taxon cell-cell junction Eumetazoa tissue epithelium https://upload.wikimedia.org/wikipedia/commons/8/8f/Illu_epithelium.jpg Editor note: surface epithelium may contain non-epithelial cells, such as melanocytes, lymphocytes and dendritic cells, within the sheet of epithelial cells. Do we consider these part of the epithelium, or located-in it? epithelial multilaminar epithelium unilaminar epithelium basement membrane of epithelium