has part has part mucosa A lining of mostly endodermal origin, covered in epithelium, which is involved in absorption and secretion. They line various body cavities that are exposed to the external environment and internal organs. It is at several places continuous with skin: at the nostrils, the lips, the ears, the genital area, and the anus. The sticky, thick fluid secreted by the mucous membranes and gland is termed mucus. The term mucous membrane refers to where they are found in the body and not every mucous membrane secretes mucus[WP] AEO:0000199 BTO:0000886 CALOHA:TS-2031 EHDAA2_RETIRED:0003234 EV:0100382 FMA has mucosa vs region of mucosa; these are subtypes of Mucosa: Mucosa of gallbladder, tongue, .... The following are subtypes of Region of mucosa: Mucosa of zone of stomach, trachea, bronchus, dorsum of tongue.... Depends on whether the covered area is an organ or organ component. Uberon does not regard organ vs organ component as crucial distinction and thus collapses these into a single class deliberately FMA:85355 FMA:85358 GAID:297 MESH:D009092 OpenCyc:Mx4rvmKNOpwpEbGdrcN5Y29ycA UBERON:0000344 UMLS:C0026724 galen:Mucosa mucosa of organ mucosa of organ part mucosal mucosal region mucous membrane organ mucosa region of mucosa tunica mucosa uberon epithelium connective tissue organ component layer