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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Pinna (auricle) |
Collects sound waves and directs them into the auditory canal |
Outer ear region |
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External auditory canal |
Carries sound waves from the pinna to the middle ear, is lined with glands that produce cerumen (earwax), a material that lubricates and protects the ear |
Outer ear |
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Tympanic Membrane (eardrum) |
Covers the inner end of auditory canal and conducts sound to auditory ossicles by vribating |
Middle ear |
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Auditory ossicles |
Conduct and amplify sound waves. 3 bones make up the auditory ossicles. Malleus (hammer), incus (anvil), & stapes (stirrup) Stapes is the smallest bone in the body |
Middle ear |
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Eustachian tube |
Narrow tubes that lead from the middle ear to the nasal cavity & throat. They open upon swallowing to equalize air pressure inside the middle ear with external air pressure. |
Middle ear |
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Inner ear (labyrinth) |
Hold the sensory receptors for hearing & balance |
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Oval window |
Membrane that separates the middle ear from the inner ear. The stapes rest on the oval window & vibrates when the tympanic membrane vibrates the ossicles. |
Inner ear |
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Cochlea |
Spiral, fluid-filled passage that leads from the oval window. It contains the organ of corti (a receptor organ that receives & relays vibration to the auditory nerves). The fluid in the cochlear duct vibrates when the membrane of the oval window vibrates. |
Inner ear |
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Semicircular canals |
Contain receptors for movement & positioning that help the body maintain balance or equilibrium. When the liquid in the canals move with the movement of the head, hairlike cells lining the canals also move and send impulses to the CNS to help maintain balance or equilibrium. |
Inner ear |
