The Bony nasal septum corresponds to which structure?

• A. Zygomatic arch
• B. Foramen magnum
• C. Bony nasal septum (perpendicular plate of ethmoid and vomer)
• D. Body of maxilla (contains the maxillary sinuses)

Answer: (C)

The portion of the nasal septum that is truly bony is formed by two bones: the perpendicular plate of the ethmoid bone and the vomer. The perpendicular plate forms the upper part of the septum, while the vomer makes up the lower part; the front part is cartilage, not bone. The zygomatic arch, foramen magnum, and the body of the maxilla (with its sinuses) do not contribute to the bony nasal septum. So the bony septum corresponds to the perpendicular plate of the ethmoid and the vomer.