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9 Cards in this Set

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  • Back
auricle (pinna)
external ear structure located on both sides of the head. The auricle directs sound waves into the external auditory meatus.
external auditory meatus (canal)
short tube that ends at the tympanic membrane. The inner part lies within the temporal bone of the skull and contains the glands that secrete earwax.
middle ear tympanic membrane (eardrum)
semitransparent membrane that separates the external auditory meatus and the middle ear cavity.
eustachian tube
connects the middle ear and the pharynx. It equalizes air pressure on both sides of the eardrum.
ossicles
bones of the middle ear that carry sound vibrations. The ossicles are composed of the malleus (hammer) incus (anvil) and stapes (stirrup). The stapes connects to the oval window, which transmits the sound vibrations to the inner ear.
labyrinth (inner ear)
bony spaces within the temporal bone of the skull. It contains the cochlea, semicircular canals, and vestibule.
cochlea
is snail-shaped and contains the organ of hearing. The cochlea connects to the oval window in the middle ear.
semicircular canals and vestibule
contains receptors and endolymph that help the body maintain its sense of balance
mastoid bone and cells
located in the skull bone behind the external audiotry meatus.