has_part has part has part only_in_taxon only in taxon composed primarily of epithelial cell cell-cell junction Metazoa protein-containing material entity 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? AEO:0000066 FMA:9639 MA:0003060 EHDAA2:0003066 epithelial tissue The two basic types of metazoan tissue are epithelial and connective. The simplest metazoans, and developmental stages of many primitive invertebrates, consist solely of these two layers. Thus, epithelial and connective tissues may be the primary (original) tissues of metazoans, and both are important in the functional organization of animals.[well established][VHOG] AAO:0010055 MESH:D004848 portion of epithelium epithelial Wikipedia:Epithelium CALOHA:TS-0288 NCIT:C12710 CARO:0000066 XAO:0003045 uberon Portion of tissue, that consists of one or more layers of epithelial cells connected to each other by cell junctions and which is underlain by a basal lamina. Examples: simple squamous epithelium, glandular cuboidal epithelium, transitional epithelium, myoepithelium[CARO]. UMLS:C0014609 UBERON:0000483 BTO:0000416 EMAPA:32738 GAID:402 TAO:0001486 VHOG:0000387 FBbt:00007005 BILA:0000066 SCTID:31610004 HAO:0000066 ZFA:0001486 AAO:0000144 multilaminar epithelium unilaminar epithelium basement membrane of epithelium