1. The Ear & Hearing By
Michael J. Harman 

2. External Ear

3. Auricle

4. External auditory meatus

5. Middle Ear

6. Tympanic membrane
Eardrum

7. Auditory ossicles

8. Malleus

9. Incus

10. Stapes

11. Auditory (Eustacian) tube

12. Internal Ear

13. Osseous labyrinth
Outer white layer (osseous means bony)

14. Membranous labyrinth
Inner gray layer

15. Cochlea

16. Oval window
Behind the stapes

17. Round window
Oval Window

18. Organ of Corti
Contains receptor hair cells

19. Semicircular canal

20. Ampulla
Swelling at one end of all 3 semicircular canals

21. Saccule
Expanded chamber that communicates with the cochlea

22. Utricle
Expanded chamber that communicates with the saccule from the semicircular canals

23. Vestibulocochlear (Auditory) nerve