Question
Which of the bone is NOT a component of the bony part of nasal septum?
| A. |
Maxilla
|
| B. |
Ethmoid
|
| C. |
Vomer
|
| D. |
Sphenoid
|
Show Answer
|
Correct Answer » A
Explanation
|
|
Bony Nasal Septum Components
The bony nasal septum is mainly formed by:
- Perpendicular plate of ethmoid
- Vomer
- Rostrum of sphenoid
Thus, ethmoid, vomer, and sphenoid contribute to the bony septum.
A. Maxilla
- Maxilla contributes to:
- Lateral wall of nose
- Hard palate
- Piriform aperture
- It does not form part of the bony nasal septum itself
Reasons to Rule Out Other Options
B. Ethmoid
- Perpendicular plate of ethmoid forms the superior part of the bony septum
C. Vomer
- Forms the posteroinferior part of the bony septum
D. Sphenoid
- Rostrum of sphenoid contributes posteriorly to the nasal septum
