Is the bony labyrinth of the inner ear really a separate bone?

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Offline amplexity

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The bony labyrinth of the inner ear consists of the cochlea, vestibule, and semi-circular canals. It is important in hearing and equilibrium.  In anatomical models and diagrams, it is depicted as a hollow bone nestled inside the temporal bones of the skull.  But I'm wondering, is it really a bone nestled within another bone, or is the bony labyrinth actually just a hollowed-out chamber inside the temporal bone? Can someone with expertise shed some light on this?  Especially, someone with first hand experience from dissection.