Labyrinth of the inner ear

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The labyrinth of the inner ear is the combined sensory organ of hearing and balance and its surrounding bony cavity located in the petrous temporal bone, consisting of two components:

  • the osseous labyrinth, the bony cavity, which houses
  • the membranous labyrinth, a tubular sac filled with endolymph fluid

    • Perilymph flows within the intervening space between the osseous and membranous labyrinths.