The Nasal Septum has a Bony part, Cartilaginous part, and Membranous part.

Bony Part: This is made up of Posterosuperiorly (The perpendicular plate of the ethmoid.) and Posteroinferiorly (Vomer BONE)

Cartilaginous Part: Anteriorly quadrilateral septal cartilage & Medial crus of the alar cartilage

Membranous Part: This is the anterior most part of the nasal septum lined by skin and fibrofatty tissue.

Articulation of the nasal septum:

1) Superiorly: Sphenoid Rostrum
2) Anteriorily: Nasal bones, nasal spine of frontal bones
3) Inferiorily: Nasal crest of the maxilla, Nasal crest palatine process, and Anterior nasal spine of maxilla

Blood Supply:

The blood supply of the septum:

Arterial is made up of Anterior Ethmoidal Artery, Superior Labial Artery, Sphenopalatine Artery, and Greater Palatine Artery

The above four arteries form a plexus in the anterio–inferior portion of the nasal septum called the Kiesselboch's plexus or Little area.

Venous Drainage:

1) Sphenopalatine vein
2) Anterior and posterior ethmoidal veins
3) Anterior facial vein
4) Cerebral veins

Nerve supply:

1) Trigeminal nerve including anterior ethmoidal nerve.
2) Sphenopalatines ganglion.