The nasal septum separates the left and right airways in the nose, dividing the two nostrils. It is depressed by the Depressor septi nasi muscle. [WP,unvetted]. [ ]

This is just here as a test because I lose it

Term information

database cross reference

uberon_slim, pheno_slim

depicted by

editor note

We follow AAO in making this part of the nasal skeleton

external definition

A median dividing wall, sagittally directed, which divides the nasal cavity into the right and the left nasal fossae. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG]

Medial, vertical plate that separates the nasal capsules.[AAO]

Medial vertical wall between nasal capsules.[AAO]

has related synonym

septum nasi

septum mobile nasi

septum of the nose

septal cartilage

homology notes

Whatever the common ancestor of the lamprey and gnathostomes may have looked like, it most likely possessed a neural-crest-derived premandibular ectomesenchyme closely associated with the NHP. Invention of the jaw subsequently required a space for the nasal septum and maxillary process to develop, which might have been provided by subdivision of the NHP into the nasal placode and the hypophysis (diplorhiny, the state of bilaterally separated nasal openings, would also have been a prerequisite for this).[well established][VHOG]