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The Ears

Body Functions ears

QuestionAnswer
The external cartilagenous flap of each ear is called a pinna AKA the auricle.
The tube leading from each pinna (auricle) to a tympanic membrane is called the external auditory canal.
A tympanic membrane is AKA “eardrum.”
Each external auditory canal is lined with modified sebaceous glands that produce cerumen AKA “earwax.”
Each middle ear is made up of three auditory ossicles (bones) called the: 1. Malleus (hammer). 2. Incus (anvil). 3. Stapes (stirrup).
The tubes that connect the middle ears to the pharynx for pressure equalization are called the Eustachian tubes.
The structure in each inner ear that is responsible for perceiving sound vibrations and conducting these vibrations to the auditory (vestibulocochlear) nerve is called the cochlea.
The connection between a stapes and a cochlea is called the oval window.
The structure in each inner ear which aids in balance (equilibrium) is called the labyrinth.
Each labyrinth is made up of the vestibule and semicircular canals.
The structures of each ear are designed to transmit sounds (vibration conduction) from the pinnae (auricles) at the external ears; through the external auditory meati; along the external auditory canals; to the tympanic membranes (eardrums); to the ossicles (malleus, incus, and stapes in the middle ears); to the oval windows on the cochleas in the inner ears; to the auditory (acoustic) nerves; to the thalamus in the brain; to the temporal lobes for interpretation.
Created by: willowsalem
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