ANATOMY OF NASAL SEPTUM
The nasal septum divides the nasal cavity into two halves.
The nasal septum has three parts:
1. Columellar septum- It is formed of columella. It is made up of medial crura of alar cartilages joined together by fibrous tissue and covered on either side by skin. a. Membranous septum- It consists of double layer of skin with no bony or cartilaginous support. It is situated between columella and caudal border of septal cartilage Both columellar and membranous parts are freely movable from side to side. 2. Septum proper- It consists of osteo-cartilaginous framework. It is covered by nasal mucous membrane. Bony part: This is made up of:
- Postero-superiorly: The perpendicular plate of the ethmoid.
- Postero-inferiorly: Vomer.
- Trigeminal nerve including Anterior ethmoidal nerve.
- Sphenopalatine ganglion.