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organ of hearing (vestibulocochlear organ)

organ of hearing (vestibulocochlear organ). external ear, the middle ear or tympanic cavity, the internal ear or labyrinth. External ear. auricula or pinna, and the external acoustic meatus. External Acoustic Meatus cartilaginous portion osseous portion

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organ of hearing (vestibulocochlear organ)

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  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 Meatuscartilaginous portionosseous 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 tubetympanic 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. 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 http://www.bartleby.com/107/ ajoy@163.com

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