Our ears are open because _____________________________________
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In its normal state, the Eustachian tube stays closed, but it will open when you yawn, swallow, chew, or hold your nose and blow. The purpose of the Eustachian tube is to provide fresh air to the middle ear space and to equalize pressure between the outer ear and the middle ear.
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The Eustachian tube typically opens automatically when you swallow, blow your nose, or yawn. When you do these motions, you'll often hear a clicking, or popping, sound. The sound is caused by air entering the middle ear through the Eustachian tube. If the tube does not open easily, it may be obstructed...
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