 Vesalius now has on display, for comparison purposes, the skeletons of a human being alongside that of an ape of which he was able to show, that in many cases, Galen's observations were indeed correct for the ape, but bear little relation to man.Clearly what was needed was a new account of human anatomy.While the lecturer explained human anatomy, as revealed by Galen more than 1000 years earlier, an assistant pointed to the equivalent details on a dissected corpse.