Art style: Pencil Sketch.
Vintage medical sketch of the Humerus upper half and middle section on warm paper. Call-out Cyrillic texts 'АНАТОМИЧЕСКАЯ ШЕЙКА' and 'ТЕЛО КОСТИ' pointing to respective areas. Vintage textbook aesthetic.
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "Pencil Sketch" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Pencil Sketch". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "Pencil Sketch" idiom, not in any other medium.
