https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13983746
An écorché showing bones, with left arm extended to the side, seen from the back: diagram showing the outlines of the muscles & bones. Line engraving by Campbell, 1816/1821.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use