| A | B |
|---|
| outer ear | pinna or auricle |
| middle ear | tympanic membrane, ossicles, eustachian tubes |
| inner ear | vestibule, semicircular canals, cochlea |
| pinna | directs sound into ear |
| ext auditory canal | passageway for sound |
| ceruminous glands | moistens & lubricates |
| tympanic membrane/oval window/ossicles | vibrate |
| eustachian tube | equalize air pressure in middle ear |
| vestibule/semicular canals | balance |
| cochlea | hearing |
| bony labyrinth | bony space in temporal bone |
| perilymph | watery fluid |
| membranous labyrinth | balloonlike membranous sac |
| endolymph | thick fluid inside membran. labyrinth |
| organ of corti | sensory neurons in cochlea |
| semicircular canals | sensitive to fluid movement in & out of canals |
| vestibule | has calcium stones here, |
| acoustic nerve receives their impulses | semicircular canals/vestibule |
