Parts outer ear middle ear



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Parts

  1. OUTER EAR

  2. MIDDLE EAR

  3. INNER EAR


Functions

  1. Hearing

  2. Balance

  3. Equilibrium



  1. The PINNA

  2. EXTERNAL AUDITORY CANAL

The pinna is the cartilage of the ear; it acts as a funnel to capture the sound.


Air.


Air

AUDITORY TUBE

The function of the auditory tube is to equalize the pressure of the middle ear and the outside air, so the ear bones can vibrate.



  1. MALLEUS (hammer). The malleus vibrates the incus

  2. INCUS (anvil). Vibrates the stapes

  3. STAPES (stirrup). Their function is to amplify sound vibrations.

The temporal bone (petrious portion).



Bony Labyrinth is filled with PERILYMPH

ENDOLYMPH.

COCHLEA

1. Semicircular Canals

2. Utricle

3. Saccule







Semicircular Canals

  1. Superior

  2. Posterior

  3. Lateral




  1. Stapes

  2. Cochlea

  3. Vestibulocochlear nerve

  4. Saccule

  5. Utricle




F

G

H

A


B

C

D



E

Cochlea and Semicircular Canals




Hearing and equilibrium

CN VIII VESTIBULAR COCHLEAR NERVE



OVAL WINDOW

SEMI-CIRCULAR CANALS

UTRICLE and the SACCULE.

Endolymph and hair cells.




OTOLITHS (“ear rocks”).

Equilibrium

It allows the hair cells in this region to act as receptors by telling you what position your head is in and provide you a sense of equilibrium.

Inflammation of the semi-circular canals that give a sense of motion when you’re not moving. This can be debilitating.





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