Ear notes

External Ear

Helps collect sound waves and direct them towards the external auditory canal

External Ear

Houses hair and ceruminous glands

External Ear

Seprates the external ear from the middle ear

External Ear

Produces cerum (earwax) which traps dust and objects

Ossicle

Middle Ear

Transmit sound vibrations from the eardrum to the incus

Ossicle

Middle Ear

Transmit sound vibrations from the malleus to the stapes

Ossicle

Middle Ear

Transmit sound from the incus to the membrane of the inner ear

Middle Ear

Equalizes air pressure between the outside air and the middle ear cavity

Inner Ear

Contains perilymph

Part of the Bony Lab.

Inner Ear

Hearing

Part of the cochlear

Conducts sound vibrations to the cochlear duct

Part of the cochlear

Conducts sound vibrations

Part of the Bony Lab.

Inner Ear

Round Window- protects the inner ear from pressure buildup and dissipates sound waves

Inner Ear

Contains endolymph

Part of the Mem. Lab.

• Contains:
• Vestibular membrane

Organ of Corti (spiral organ)- consists of inner and outer hair cells that attaches to the tectorial membrane

• Hair Cells- inner hair- hearing
• outer hair- regulating the tension of the basilar membrane

Tectorial Membrane- covers the hair cells

• Basilar Membrane- causes the bending of the sterocilia of inner hair cells

Part of the Mem. Lab

Dectect motion and orientation

Contain hair cells with the hair embedded in a membrane that contains otoliths

Part of the Mem. Lab.

Detect motion and orientaion

Part of the Mem. Lab

Enabled a person to detect movement in all direction

• Contains
• Ampulla which form a Crista Ampullaris that sense angular acceleration and deceleration