Nasal septum
Septum nasi
RespiratoryOrgansHead
- What it is
- The midline wall dividing the nasal cavity, formed by the perpendicular plate of the ethmoid above, the vomer below and the septal cartilage in front, all covered by vascular mucosa.
- Function
- Separates the two nasal passages and supports the nasal dorsum.
- Size
- About 7 cm long and 2–4 mm thick; most adults have a slight deviation to one side.
- Clinical note
- Kiesselbach's plexus on the front of the septum (Little's area) is the source of about 90% of nosebleeds.