The tube that connects the middle ear with the pharynx is the?

• A. Eustachian tube
• B. Cochlear duct
• C. Semicircular canal
• D. Auditory canal

Answer: (A)

Focus on how the ear stays properly ventilated and pressure-balanced. The tube that links the middle ear to the pharynx is the Eustachian tube, also called the pharyngotympanic tube. Its job is to vent the middle ear and drain secretions into the throat, helping keep the eardrum in the right position for vibration when air pressure changes, such as during altitude shifts or swallowing. The tube is normally closed and only opens briefly when you swallow or yawn, which equalizes air pressure on both sides of the eardrum and prevents discomfort or hearing problems. The other structures don’t connect to the pharynx: the cochlear duct is part of the inner ear involved in hearing, the semicircular canals are part of the balance system, and the auditory canal is the external ear canal that carries sound into the eardrum.