1. organ of hearing (vestibulocochlear organ)
external ear,
the middle ear or tympanic cavity,
the internal ear or labyrinth

2. External ear auricula or pinna, and the external acoustic meatus.
External Acoustic Meatus cartilaginous portion osseous portion
The Tympanic Membrane It is a thin, semitransparent membrane
1. Tympanic membrane.
2. Umbo.
3. Handle of the malleus.
4. Lateral process.
5. Pars flaccida.

3. Middle ear
tympanic cavity
auditory tube
mastoid sinus
mastoid cell

4. Tympanic cavity Wall superior-Tegmental Wall infeiior-Jugular Wall
anterior-carotid wall posterior-mastoid wall lateral-Membranous medial –Labyrinthic wall
internal structure
Auditory Ossicles
malleus,
incus,
stapes.

5. Auditory tube tympanic cavity communicates with the nasal part of the pharynx The tube is opened during deglutition . It is formed partly of bone, partly of cartilage and fibrous tissue

6. mastoid sinus and cells

7. internal ear
Labyrinthus osseus
Labyrinthus membranaceus;

8. labyrinthus osseus   
vestibule,
semicircular canals
cochlea

9. The Semicircular Ducts The Ductus Cochlearis
Membranous labyrinth
The Utricle
The Saccule
(macula acustica )
The Semicircular Ducts
(crista ampullaris )
The Ductus Cochlearis
(spiral organ of Corti )

10. conduction of sound

11. Thank you