During swallowing, chewing, yawning, or jaw movement, the ________ tube is opened to equalize air pressure on both sides of the eardrum.
Fill in the blank(s) with the appropriate word(s).
eustachian
The eustachian tube is usually collapsed, except during swallowing, chewing, yawning, or jaw movement. The tube equalizes pressure on both sides of the eardrum.
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