Not a pa of bony labyrinth?
The inner ear within the petrous pa of temporal bone consists of a membranous labyrinth enclosed in a bony (osseous) labyrinth. So, inner ear has two pas : ? 1) Bony labyrinth :- Cochlea, Vestibule, Semicircular canals. 2) Membranous labyrinth :- Cochlear duct, utricle, Saccules, three semicircular ducts, and endolymphatic duct & sac.
Cochlea
Vestibule
Utricle
Semicircular canal