1. Sound 1-4 Parts of the ear Outer ear- funnels sound waves
Middle ear- transmits the waves inward
Inner ear- converts the waves for your brain
Outer Ear
ear canal- narrow region 2-3 centimeters long located before the eardrum
Eardrum- small tightly stretched drum like membrane

2. Sound 1-4
Middle Ear
Contains the three smallest bones in the human body- hammer, anvil, and stirrup
Eardrum hits the hammer which hits the anvil which shakes the stirrup
Inner Ear
Contains the cochlea, cochlea is a liquid filled membrane with more than 10,000 tiny hairs.
Stirrup vibrates>>vibrates liquid>> hairs sway>>nerves attached to the hairs interpret the movements and send the info. to the brain
Cochlea – snail shaped cavity located in the inner ear filled with liquid and > 10,000

3. Sound 1-4 Hearing loss -injury, infection, or aging
Injury- eardrums damaged, loud noises destroy hairs, anvil separated
Infection- viruses or bacteria may damage inner ear
Aging- as you age the hairs don’t respond as well or are not present