Jacques Dubois

Jacques Dubois (Latinised as Jacobus Sylvius; 1478 – 14 January 1555) was a French anatomist. Dubois was the first to describe venous valves, although their function was later discovered by William Harvey. He was the brother of Franciscus Sylvius Ambianus (François Dubois; c. 1483 – 1536), professor of humanities at the Collège de Tournai, Paris. Provided by Wikipedia