[Was Harvey the true discoverer of blood circulation? "Render under Cesar that which is Cesar's" (Matthew XXII, 21].

Nobody can deny Harvey was the discover of blood circulation. Yet he had four forerunners: Cesalpino (1515-1603), Realdo Colombo (1516-1559), Michel Servet (1511-1553), and the Arab Ibn an-Nafîs, who had already described the small circulation in 1240. In fact Harvey brought experimental proofs in his famous De motu cordis, considered by Flourens as "the most excellent book of physiology".