paranasal sinus https://upload.wikimedia.org/wikipedia/commons/f/fb/Nnh_front.svg EMAPA:35662 UBERON:0001825 UMLS:C0030471 FMA:59679 EV:0100038 EHDAA:6489 NCIT:C12763 Arise as epithelial lined diverticula of the lining of the nasal cavity. The extent of sinus development varies with species, most of the development occurs postnatally MA:0000431 CALOHA:TS-2082 The paired air-filled cavities surrounded by the bones of the face that are lined by mucous membranes and are continuous with the nasal cavity. MESH:D010256 SCTID:181203001 GAID:355 sinus nasal sinus Wikipedia:Paranasal_sinuses anatomical cavity