The Ear

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The Ear
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3 Main Parts outer, middle, and inner
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OUTER EAR

• The outer ear is the part visible on each side of
  your head. It's made up of folds of skin and
  cartilage, called the pinna (PIN-uh), and the ear
  canal.

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Middle Ear

• The middle ear is an air-filled cavity between
  the eardrum and inner ear. It's connected to the
  back of your nose and upper part of your throat
  by a narrow channel called the auditory tube
  (eustachian tube).

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Bones of the Middle Ear

• The middle ear cavity contains three tiny bones
  the hammer, anvil and stirrup named for their
  corresponding shape
• When sound waves travel through the ear canal,
  the vibration of your eardrum causes these bones
  to vibrate

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Inner Ear

• The inner ear contains two of the most intricate
  parts of the hearing mechanism the cochlea and
  vestibular labyrinth

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Cochlea

• Sound vibrations from the oval window travel into
  the fluid of the cochlea, where tiny specialized
  cells convert the vibrations into electrical
  impulses.

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Semicircular Canals

• The vestibular labyrinth consists of three
  semicircular tubes that connect to one another
  and control your sense of balance. These canals
  contain fluid and cells sensitive to fluid
  movement. The cells track your body's movement so
  that you're aware of where your head is in
  relation to the world around you.

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Inner Ear
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Auditory Nerve

• Electrical impulses travel through the auditory
  nerve to various information processing centers
  within your brain.

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