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Figure 2. Anatomy of the nasal septum. 1, Frontal bone; 2, nasal bones; 3, perpendicular plate of the ethmoid; 4, vomer; 5, palatine bone; 6, nasal crest of maxilla; and 7, quadrangular cartilage. Reprinted with permission from OtolaryngologyHead and Neck Surgery. 3rd ed. Copyright 1998, MosbyYear Book Inc.