[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_66":67,"_68":69,"_70":71,"_72":73,"_74":75,"_76":77,"_78":12,"_79":75},"routes/glossary.$slug",{"_9":10,"_11":12},"term",{"_13":14,"_9":14,"_15":16,"_17":18,"_19":12,"_20":12,"_21":12,"_22":-5,"_23":24,"_25":26,"_27":28,"_29":30},"showAll",false,"slug","epithelium","definitionHtml","

Refers to layers of cells that line hollow organs and glands or make up the outer surface of the body.

Epithelial cells help to protect or enclose organs and most produce mucus or other secretions.

They're arranged in single or multiple layers, depending on the organ and location.

","definitionText","Refers to layers of cells that line hollow organs and glands or make up the outer surface of the body. Epithelial cells help to protect or enclose organs and most produce mucus or other secretions. They're arranged in single or multiple layers, depending on the organ and location.","isScientific","isCrossReference","isArchived","crossReferenceTo","illustrations",[],"related",[53,54,55],"species",[31,32,33,34,35,36],"speciesCount",24,{"_13":51,"_38":45,"_40":52},{"_13":49,"_38":45,"_40":50},{"_13":47,"_38":45,"_40":48},{"_13":44,"_38":45,"_40":46},{"_13":42,"_38":39,"_40":43},{"_13":37,"_38":39,"_40":41},"oryzias-wolasi","genus","Oryzias","epithet","wolasi","oryzias-asinua","asinua","channa-barca","Channa","barca","channa-baramensis","baramensis","channa-aurantimaculata","aurantimaculata","channa-asiatica","asiatica",{"_13":63,"_9":63,"_57":64,"_20":12,"_19":12,"_29":65},{"_13":60,"_9":60,"_57":61,"_20":12,"_19":12,"_29":62},{"_13":56,"_9":56,"_57":58,"_20":12,"_19":12,"_29":59},"pseudobranch","definition","Accessory or spurious gill, often located on the inner surface of the operculum in various fishes, that is usually small and sometimes completely obscured beneath the epithelium. Also referred to as pseudobranchia.",0,"mucus","Slimy, viscous substance used as a protective lubricant. Secreted by mucous membranes.",7,"gland","Cell, cell group, or organ secreting a substance used elsewhere in the body.",83,"requestId","536871ea-e7e4-419f-b18d-d42f591d0239","nonce","IjeoL5BRK/8bd5MVdGbLkg==","analyticsToken","d6ab6d3180364bdf8f98e5d5fa0b1eb7","siteUrl","https://www.seriouslyfish.com","indexable",true,"adPlaceholders",{"_80":81,"_82":83,"_84":85,"_86":87,"_88":89,"_90":91,"_92":93,"_94":95,"_96":97,"_98":99},"adSlotPreview","ezoicEnabled","top_of_page","126","sidebar","127","sheet_foot","128","in_content_1","129","in_content_2","130","in_content_3","131","in_content_4","132","in_content_5","133","in_content_6","134","bottom_of_page","135"]

Used in 24 species profiles