Create a medical 3D animation focusing ONLY on the Eustachian tube.
Show a clear side-view sagittal section of the human head, including the external ear, middle ear, tympanic membrane, Eustachian tube and nasopharynx.
The Eustachian tube must be clearly visible as a real anatomical tube connecting the middle ear to the nasopharynx.
Highlight the Eustachian tube with a subtle glow so its entire course is easy to follow.
First show the tube CLOSED. Then show swallowing and demonstrate the Eustachian tube OPENING, allowing air to move from the nasopharynx into the middle ear and equalize pressure.
Keep the anatomy realistic and medically accurate.
Do NOT create exaggerated or distorted anatomy. Do NOT focus on the cochlea or inner ear. Do NOT show the brain.
The main subject must be the Eustachian tube and its opening mechanism.
Professional ENT medical animation, realistic 3D anatomy, clean background, vertical 9:16, 10–15 seconds.