1. External Auditory Meatus
    Directs sound waves
  2. Pinna (auricle)
    Collects sound waves
  3. Tympanic Membrane
    Provides a surface for a collection of sound
  4. Auditory (Eustachian) Tube
    Regulates pressure of middle ear
  5. Malleus, Incus, and Stapes
    Transmits vibration to perilymph
  6. Tensor Tympani Muscle
    Prevents extreme tympanic movement
  7. Ampulla
    Involved in rotational movement of the head
  8. Cochlea
    Transforms sounds into neural messages
  9. Basilar Membrane
    Motion bends hair cells
  10. Cochlear Duct
    Provides sense of hearing
  11. Organ of Corti (hair cells)
    Generates action potentials
  12. Tectorial Membrane
    Generates action potentials
  13. Tympanic Duct
    Carries sound waves
  14. Vestibular Membrane
    Isolates perilymph from endolymph
  15. Vestibular Duct
    Carries sound waves
  16. Oval Window
    Transmits pressure waves in perilymph
  17. Round Window
    Relieves pressure from cochlea
  18. Semicircular Canal (bony labyrinth)
    Contains Perilymph
  19. Spiral Ganglion
    Special sense neuron cell bodies for hearing
  20. Vestibular Ganglion
    Contain cell bodies
  21. Vestibule
    • Contains Perilymph
    • Responds to changes in the position of the head with respect to gravity
  22. Saccule
    Head tilt
  23. Utricle
    • Contains Endolymph
    • Head tilt
  24. Cochlear Branch
    Transmits hearing information
  25. Vestibular Branch
    Transmits balance information
  26. Crista Ampullaris
    Receptors for rational movement of head
Card Set
Functions of the Ear