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The Senses – The Ear
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Ears https://www.youtube.com/watch?v=kzo45hWXRWU
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The Ear Complex organ that has 3 functions: Receive sound
Maintain balance Detect body’s spatial movement
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The Ear Subdivided into 3 sections: External ear Middle ear Inner Ear
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The Ear Subdivided into 3 sections: External ear Middle ear Inner Ear
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Outer Ear Composed of 2 parts: Pinna (outer ear) Auditory canal
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Pinna Acts as a funnel that captures sound waves
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Auditory Canal Brings the sound to the middle ear
Protects the ear drum and internal ear from insects, bacteria and dust The canal has hairs and secretes a wax that capture the foreign particles
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Middle Ear Composed of: Ear drum
Ossicles (hammer, anvil and stirrup) (also called malleus, incus and stapes) Eustachian tube
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Ear Drum The ear drum is a very sensitive membrane that vibrates when sound hits it It seals the middle ear from the outside world The ear drum is transmits the vibrations to three small bones (ossicles)
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Ossicles (smalles bones)
The first bone is called the “hammer” The second is the “anvil” The third is the “stirrup” The bones transmit the sound vibrations of the ear drum to the inner ear
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