The roof of the olfactory region is formed by

The bony pa of the olfactory region is formed by: The vomer and The perpendicular plate of ethmoid.It's margins receive contributions from nasal spine of the frontal bone, the rostrum of the sphenoid and the nasal crests of the nasal palatine and maxillary bones. The cailaginous pa is formed by: The septal cailage and The septal processes of the inferior nasal cailages. The cuticular pa or lower end is formed by fibrofatty tissue covered by skin. Ref BDC volume 3,sixth edition