Question | Answer |
What is the outer ear? | Pinna(Auricle), collects sound waves. |
What is the external auditory canal? | Ear canal. |
What is cerumen? | Earwax, protects the ear. |
What is the tympanic membrane? | Ear drum, seperates the outer and middle ear. |
What is the middle ear? | Cavity in temporal bone, connects with pharynx by eustachian tube. Bones in the middle ear transmit sound waves from ear drum to inner ear. Malleus(hammer), incus(anvil), stapes(stirrup) |
What is the eustachian tube? | Equalizes pressure in the middle ear with outside atmosphere |
What is the inner ear? | Contains spiral shaped organ of hearing-the cochlea, the cochlea contains a membranous tube, the cochlear duct. |
What is the cochlear duct? | Filled with fluid that vibrates when sound waves are transmitted by the stapes. |
What is the organ of court? | Delicate hairllike cells that pick up vibrations of fluid and transmit them as a sensory impulse along the auditory nerve to the brain. |
What are semicircular canals? | Three structures in the inner ear, contain liquid that is set in motion by head and body movements-impulses sent to cerebellum to help maintain body balance(equilibrium) |
Pathway of hearing. | Auditory canal, tympanic membrane, ossicles(malleus, incus, stapes), cochlea, auditory nerve, brain. |