+ Ear Parts and Functions. + The EAR Primary Function is Hearing & Equilibrium Hair Cells: Mechanoreceptors Divided into 3 regions 1. Outer Ear 2. Middle.

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Presentation transcript:

+ Ear Parts and Functions

+ The EAR Primary Function is Hearing & Equilibrium Hair Cells: Mechanoreceptors Divided into 3 regions 1. Outer Ear 2. Middle Ear 3. Inner Ear

+ Outer Ear Pinna: Catches sound waves, provides directional sensitivity. Ear Canal: sound waves are sent, buildup of ear wax called Cerumen

+ Outer Ear Continued Eardrum: also known as tympanic membrane; this vibrates when sound enters. Separates the outer ear from the middle ear.

+ Middle Ear Auditory Ossicles – Connect eardrum with inner membrane. Malleus (Hammer) vibrates Then incus (anvil) is hit by the malleus vibrating the stapes (stirrup) Oval window: membrane that leads the middle ear into the inner ear

+ Middle Ear Continued Eustachian Tube: Connects middle ear to pharynx Normally it is closed but can be open a little to allow air through to prevent damage Helps with mucous draining of middle ear and equalization of pressure.

+ Inner Ear Vestibule – sensations of gravity and linear acceleration Semicircular Canals – stimulated by rotation of head Cochlea – Sensation of Hearing

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