system
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
Length of Eustachian tube?
assistant
The correct answer is  Length of Eustachian tube is 36 mm. (reached by the age of 7 years) Lateral third (i.e. 12 mm) is bony. Medial 2/3 (i.e. 24 mm) is fibrocailaginous.