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What is Osteomeatal complex (OMC) connects- and explain in detail?
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.