Hearing - The Ear (Leaving Cert Biology): Flashcards
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Practise the cards
15 cards from this deck
Two main functions of the ear
Two main functions of the ear
Hearing and balance
Three sections of the ear
Three sections of the ear
Outer ear, middle ear, inner ear
What fills the outer and middle ear?
What fills the outer and middle ear?
Air
What fills the inner ear?
What fills the inner ear?
Lymph
Function of the pinna
Function of the pinna
Collects sound vibrations and channels them to auditory canal
What does the eardrum do?
What does the eardrum do?
Vibrates when stimulated by sound vibrations
What are the ossicles?
What are the ossicles?
Three tiny bones: hammer, anvil, stirrup
Function of Eustachian tube
Function of Eustachian tube
Equalises pressure on either side of eardrum
Function of cochlea
Function of cochlea
Hearing - spiral tube with organ of Corti
Function of semi-circular canals
Function of semi-circular canals
Balance - three canals at right angles
Auditory nerve sends impulses to...
Auditory nerve sends impulses to...
Cerebrum
Vestibular nerve sends impulses to...
Vestibular nerve sends impulses to...
Cerebellum
Smallest bone in the body
Smallest bone in the body
Stirrup
Cause of glue ear
Cause of glue ear
Fluid build-up in middle ear, often from viral infection
Treatment for severe glue ear
Treatment for severe glue ear
Grommets inserted into eardrum