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The Ear. Life Science Chris Petriccione. Questions. How do we hear things and understand what is being said? Why are our ears on the side of our head, when rabbits have them on top of their heads? What causes hearing loss?. The Ear. There are three main parts: Outer Ear Middle Ear

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The Ear

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The Ear

Life Science

Chris Petriccione


Questions

  • How do we hear things and understand what is being said?

  • Why are our ears on the side of our head, when rabbits have them on top of their heads?

  • What causes hearing loss?


The Ear

  • There are three main parts:

    • Outer Ear

    • Middle Ear

    • Inner Ear


Outer Ear

  • The outer ear collects sound and sends it down ear canal to eardrum


Middle Ear

  • Sound vibrations travels from ear drum to the bones of the middle ear.

  • Sound hits the hammer, which passes to the anvil, and finally to the stirrup, where the vibration is passed to the cochlea.


Question

  • Why use bone as a transmitter of sound vibrations?


Inner Ear

  • The cochlea is a fluid filled spiral, which is where the vibrations travel to the organ of Corti

  • The organ of Corti is a strip of tiny hairs (about 20,000) which are nerve endings that detect vibrations and send it to the brain.


Sound

  • Travels in waves


Question

  • Why are rabbits ears located on top of their head, whereas our ears are on the side of our head?


Hearing Loss

  • What causes hearing loss?


Balance

  • What does all of this have to do with balance?


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