1203 Ear Study Resources

Pinna (Auricle)The visible part of the ear that is outside the head and helps to collect sound waves.
Ear CanalThe tube leading from the outer ear to the eardrum.
Eardrum (Tympanic Membrane)A thin membrane that vibrates in response to sound waves, marking the beginning of the middle ear.
OssiclesThe three small bones in the middle ear (malleus, incus, stapes) that transmit sound vibrations.
MalleusThe first of the three ossicles, attached to the eardrum and connected to the incus.
IncusThe middle ossicle, which transmits vibrations from the malleus to the stapes.
StapesThe last of the ossicles, which transmits sound vibrations to the oval window of the cochlea.
Oval WindowThe membrane-covered opening that receives vibrations from the stapes and leads into the cochlea.
Round WindowA flexible membrane that allows for movement of fluid within the cochlea when the oval window vibrates.
CochleaThe spiral-shaped organ in the inner ear that translates vibrations into neural signals.
Semicircular CanalsThree looped tubes filled with fluid that help maintain balance and detect rotational movements of the head.
Organ of CortiThe sensory organ inside the cochlea, containing hair cells that convert fluid waves into electrical signals.
Hair CellsSensory receptors within the Organ of Corti that are responsible for converting sound vibrations into nerve impulses.
Basilar MembraneThe membrane in the cochlea that supports the Organ of Corti and responds to different frequencies of sound.
Tectorial MembraneThe membrane that lies above the hair cells in the Organ of Corti and is critical for their stimulation.
Auditory NerveThe nerve that carries auditory signals from the cochlea to the brain for interpretation as sound.
Vestibular SystemThe system that includes the semicircular canals and other structures, helping to maintain balance and spatial orientation.
Scala VestibuliThe upper canal in the cochlea filled with perilymph fluid, which is part of the pathway for sound-induced fluid waves.
Scala TympaniThe lower canal in the cochlea, also filled with perilymph and part of the fluid wave pathway.
Cochlear DuctThe middle canal in the cochlea, filled with endolymph and housing the Organ of Corti.
PerilymphThe fluid that fills the scala vestibuli and scala tympani in the cochlea.
EndolymphThe fluid within the cochlear duct (scala media) that bathes the hair cells of the Organ of Corti.