middle ear

a membrane-lined cavity in the temporal bone of the skull. It is filled with air and communicates with the nasopharynx through the eustachian tube. It contains the ossicles, which transmit sound vibrations from the outer ear and the tympanic membrane (eardrum) to the oval window of the inner ear. Also called tympanic cavity.

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Psychology term of the day

January 31st 2025

biological factor

any physical, chemical, genetic, or neurological condition associated with psychological disturbances.