Ear - EAR EAR External (outer) ear - channels sound waves...

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EAR
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EAR External (outer) ear - channels sound waves to middle ear Middle ear - directs sound waves to oval window Internal (inner) ear - contains mechanoreceptors (hair cells) for hearing & equilibrium
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Outer Ear Fleshy auricle (pinna) directing air vibrations down auditory canal (external auditory meatus)
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MIDDLE EAR Air-filled cavity in temporal bone Separated from the exterior by the tympanic membrane (ear drum) Filled with air by auditory tube (Eustachian tube) connected to nasopharynx The auditory tube opens during swallowing or yawning to equalize air pressure on both sides of eardrum. Ear ossicles span tympanic cavity - held in place by tensor tympani and stapedius muscles
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Anatomy of Middle Ear
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INNER EAR Consists of: 1. Bony labyrinth - passageways in the temporal bone that contain perilymph 2. Membranous labyrinth - fleshy tubes lining bony tunnels filled with endolymph and floating in perilymph Houses cochlea and vestibular apparatus
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Anatomy of the Cochlea 2.5 coils 3 fluid-filled chambers Organ of Corti
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This note was uploaded on 09/24/2011 for the course BSC 1085 taught by Professor Staff during the Summer '09 term at Broward College.

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Ear - EAR EAR External (outer) ear - channels sound waves...

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