| Membranous | cartilage | Bones |
|---|---|---|
| Portion | Quadrilateral cartilage | Perpendicular plate of ethmoid |
| Anterior nasal septum also has a contribution fronm the lower and supper lateral cartilage.(Quadrilateral cartilage is 3-4mm thick in centre but 4-8mm anteroinferiorly which is called foot plate) | Voma | |
| Maxillary cert | ||
| Palatine cert |
Protection