Hearing In Mammals Steps Flashcards
- Outer ear captures sound waves
Usually includes _ (visible ear part)
Pinna
- Outer ear includes pinna, ear canal, and _
Muscles to move the pinna
Sound created when objects vibrate, causing _
Particles in air to vibrate, too
Dogs move their ears to _
Capture sound waves
- Middle ear
Middle ear _ sound
Amplifies
- In middle ear, three small bones called _ work together (3)
Malleus
Incus
Stapes
- In inner ear. Malleus, incus, and stapes work together to _ sound waves from ear drum to inner ear (3)
Receive
Amplify
Transmit
Sound waves cause eardrum to vibrate; vibrations are then passed to _
Ossicles
Vibrations in ossicles pass sound waves to _
Fluid in inner ear
Ossicles are the _
Three tiny bones
Ossicles evolved from bones in the _
Jaw
Bones in order from closest to drum to farthest from drum (3)
Malleus
Incus
Stapes
Oval window (far end of stapes) connects _
Middle and inner ear
_ connects middle ear with throat
Eustachian tube
Eustachian tube drains fluid, and also _ in ear
Equalizes air pressure
- Inner ear
Inner ear includes semicircular canals which are involved in _
Balance
- inner ear
Inner ear includes cochlea, which _
Converts sound waves into electrical signal
Fluid-filled cochlea houses thousands of tiny _ that convert sound waves into electrical signals
Hairs
Fluid-filled semicircular canals contain tiny hairs that _ in response to movement
Bend as fluid moves over them
Bending of hairs in semicircular canals converted into electrical signals that _
Pass to brain
_ carries info about balance to brain
Vestibular nerve
_ carries auditory signals to brain
Cochlear nerve
