Medical anatomical illustration, strict side-view sagittal cross section of a human head. Cutaway diagram showing internal anatomy only. NO external face, NO skin surface, NO eyes, NO nose shape, NO lips. This is NOT a portrait. Educational medical textbook style. Clean white background. Neutral lighting. High anatomical accuracy. Fixed camera, no perspective change. Medical anatomical illustration, strict side-view sagittal cross section of a human head. Cutaway diagram showing internal anatomy only. Visible structures: oral cavity, tongue (relaxed and flat), soft palate lowered, nasal cavity closed, glottis open, Eustachian tube neutral, middle ear and eardrum in resting position. No lung or diaphragm visible. No motion. Calm, neutral state. Educational medical textbook style. Clean white background. Highly accurate anatomy. See more