The Eustachian tube, also known as the auditory tube, is a small passageway that connects the middle ear to the back of the throat. It plays a crucial role in equalizing the air pressure between the middle ear and the environment. The Eustachian tube is responsible for regulating pressure changes in the middle ear, allowing the ear to function properly. It opens during activities like swallowing or yawning, allowing air to enter or leave the middle ear and equalize the pressure. This action helps to protect the eardrum from damage and ensures optimal hearing. Additionally, the Eustachian tube serves as a drainage pathway for fluid that may accumulate in the middle ear, helping to maintain a healthy and balanced ear environment.

英語での「Eustachian tube」の定義と意味

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