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Ear
Vocabulary
10
Biology
9th Grade
05/19/2010

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Term
hammer
Definition
the first ossicle; it touches the eardrum and transfers vibration from the eardrum to the anvil
Term
external auditory canal
Definition
tube that conducts external sound waves to the inner ear
Term
auricle/pinnae
Definition
external structure that collects and directs sound waves to the auditory canal
Term
stirrup
Definition
the third ossicle; transfers vibration sent to it from the hammer and anvil to the cochlea
Term
eardrum/tympanum
Definition
membrane that vibrates as sound waves, transport via auditory canal, strike it
Term
anvil
Definition
the middle ossicle; transfers vibrations from the hammer to the stirrup
Term
Eustachian tube
Definition
connects the middle ear wit hthe roof of the mouth
Term
cochlea nerve
Definition
transmits nerve impulses to the brain
Term
cochlea
Definition
tightly coiled, fluid filled snail shell structure which houses the sound receptors
Term
semicircular canal
Definition
canals in the inner ear which detect rotation of the head and are important in the maintenance of balance
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