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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Eustachian tube passes between
assistant
The correct answer is  The auditory tube passes between the large gap between the upper concave border of the superior constrictor and the base of the skull is semilunar and is known as the sinus of Morgagni. It is closed by the upper strong pa of the pharyngobasilar fascia. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.