Learning Resources Cross-Section Head Model LER 1909 Manuel d'utilisateur télécharger pdf (Page 6)

A. Eardrum—thin piece of skin separating the outer and middle ear that

vibrates and amplifies sound waves before entering the middle ear

B. Cochlea—spiral-shaped tube of the inner ear that contains nerve endings

that are needed for hearing

C. Middle ear—central part of the ear that consists of the eardrum and a cavity

containing three small bones

D. Eustachian tube—tube that connects the middle ear to the pharynx and

equalizes air pressure on either side of the eardrum

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Learning Resources Cross-Section Head Model LER 1909 Manuel d'utilisateur Page 6