Wax male anatomical figure, showing venous system, 1776-1780.

ITALY - NOVEMBER 15: Wax male anatomical figure, showing venous system, 1776-1780. Anatomical model of a man showing the venous system with the heart, bladder and diaphragm. Almost certainly made in Florence by the artists Clemente Susini and Francesco Calenzuoli, this is a small scale version of a set of life-size wax models made for the University of Florence and still surviving in the Museo Zoologico there. They were provided to the university for teaching purposes by the Grand Duke of Tuscany for teaching purposes. (Photo by Science & Society Picture Library/SSPL/Getty Images)