Osteomeatal complex (OMC) connects-

The osteomeatal complex is a narrow anatomical region consisting of:- Multiple bony structures (middle turbinate, uncinate process, Bulla ethmoidalis). Air spaces (frontal recess, ethmoidal infundibulum, middle meatus) Ostia of anterior ethmoidal, maxillary and frontal sinuses → , therefore, connects these sinuses to nasal cavity.