Inside your ear

Original Article:  http://www.mayoclinic.com/health/medical/IM02073
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Inside your ear

Illustration showing inner ear

The eustachian tube, which connects your middle ear to the back of your nose and throat, equalizes pressure in your ear. The air pressure in your middle ear usually is the same as that in your outer ear. When you swallow or yawn, your eustachian tube normally opens and allows air to flow into or out of your middle ear, equalizing the pressure.
IM02073

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