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What structures form the nasal septum?
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olfactory system
Sagittal view of the human nasal cavity.
The nasal septum is the wall that separates the two nasal cavities. Its supporting framework is composed of three primary structures:12
- Ethmoid bone: Located in the upper portion of the septum.2
- Vomer bone: Located in the lower portion of the septum.2
- Septal cartilage: Located in the front of the septum.2
The septum is covered by a mucous membrane, which is thick and highly vascular in its lower two-thirds, while the upper portion is covered by a more specialized, less vascular olfactory membrane.2