Alexander McGowan-Yeo (Alex)-
What is the outer ear called?
The pinna.
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What is the function of the pinna?
Amplifies and funnels sound waves into the ear.
(Larger surface area collects more soundwaves)
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What is the ear canal also known as?
External auditory canal.
(aka external auditory meatus)
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What is the function of the ear canal?
Act as an entryway for sound waves, which get propelled toward the tympanic membrane (ear drum).
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What is the ear drum also known as?
Tympanic membrane.
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What is the function of the tympanic membrane?
Vibrates transferring sound waves to the middle ear.
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What are the ear ossicles (in order)?
Hammer, anvil, stirrup.
(malleus), (incus), (stapes).
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What is the function of the ear ossicles?
Receive the vibrations from the eardrum. Amplify the vibrations, passing sound waves to the inner ear.
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What comes after the ear ossicles?
The oval window.
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What is the function of the oval window?
Separates the middle and inner ear. Passes vibrations from the stirrup/stapes to the cochlea.
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What is the function of the cochlea?
Vibrations are transferred into electrical impulses by the organ of Corti within the cochlea.
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What is the function of the cochlea/auditory nerve?
Carries electrical impulses from the cochlea to the brain.
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What is the function of the semi-circular canals?
Respond to motion of the head/body. Responsible for balance and send impulses to the brain via the vestibular nerve.
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What is the function of the eustachian tube?
To equalize air pressure between the atmosphere and the middle ear. Opens and closes to control air pressure.
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What does the cochlea contain?
Fluid.
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What does the eustachian tube contain?
Air.
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What does the outer ear consist of?
Pinna, external auditory canal (ear canal), and tympanic membrane (ear drum).
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What does the middle ear consist of?
Tympanic membrane (ear drum), the ear ossicles, and eustachian tube.
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What does the inner ear consist of?
Cochlea, semi-circular canals, and vestibule/cochlea nerves.
