Which structure connects the pharynx to the middle ear to equalize pressure?

Which structure connects the pharynx to the middle ear to equalize pressure?

• A. Eustachian Tube
• B. Malleus
• C. Incus
• D. Semicircular Canal

Answer: (A)

Air pressure in the middle ear is equalized with the outside environment by a passage that links the pharynx to the middle ear. This channel, the auditory (Eustachian) tube, is normally closed but opens briefly during actions like swallowing or yawning, allowing air to flow into or out of the middle ear so the tympanic membrane can vibrate properly. It also helps drain mucus from the middle ear into the pharynx. When this tube doesn’t open well, pressure differences can cause ear fullness, pain, or infections. The other structures mentioned are involved in other functions: the malleus and incus are small bones that transmit sound vibrations in the middle ear, while the semicircular canals are part of the inner ear that helps with balance.

Air pressure in the middle ear is equalized with the outside environment by a passage that links the pharynx to the middle ear. This channel, the auditory (Eustachian) tube, is normally closed but opens briefly during actions like swallowing or yawning, allowing air to flow into or out of the middle ear so the tympanic membrane can vibrate properly. It also helps drain mucus from the middle ear into the pharynx. When this tube doesn’t open well, pressure differences can cause ear fullness, pain, or infections. The other structures mentioned are involved in other functions: the malleus and incus are small bones that transmit sound vibrations in the middle ear, while the semicircular canals are part of the inner ear that helps with balance.