Wikimedia Commons 3D models

Search Wikimedia Commons for openly licensed 3D meshes the reader can rotate in the answer: the BodyParts3D set (one STL per bone and organ), Visible Human organ surfaces (heart, lungs, liver, kidneys), bone and skull scans, and museum specimen scans. Results are ranked by how well the file's title names what was asked, so query the structure itself ('femur', 'heart', 'lumbar vertebra', 'skull') rather than a sentence. Every result is public domain, CC0, CC BY or CC BY-SA and carries the licence, the author, the file page to cite, and a direct mesh URL (metadata.modelUrl) — pass that URL with the title, attribution, licence and file page to render_model. Coverage is real but partial: most bones, the skull, brain, heart, lungs, liver and kidneys are there; many soft organs are not, and an empty result means say so and offer a labelled plate from search_wikimedia_commons instead. Not a source of facts on its own — cite OpenStax or Bookshelf for the anatomy.