The singular form is septum; the plural form is septa.
The plural form of septum is septa.
The correct plural form for "septum" is "septa."
Anything that has to do with the concept of seven. September - use to be the seventh month in the old Julian calender. Septane an organic alkane molecule with seven carbon atoms.
Nasal septum
The singular form of the demonstrative pronoun 'these' is this.
The vomer is the nasal septum.
The singular form of "that" is "it."
The singular form of "cuffs" is cuff.
The singular form of "stratum" is "stratum." The word does not change in its singular form.
The singular form of feet is foot.
The singular form of diagnoses is diagnosis.
The singular form of scissors is "scissor."