William Harvey (1 April 1578 – 3 June 1657)

William Harvey 
(1 April 1578 – 3 June 1657)
 

William Harvey (1 April 1578 – 3 June 1657) was an English physician who was the first to describe correctly and in detail the systemic circulation and properties of blood being pumped to the body by the heart.

http://en.wikipedia.org/wiki/William_Harvey 

"De Motu Cordis" (otherwise known as "On the Motion of the Heart and Blood")

(http://en.wikipedia.org/wiki/De_Motu_Cordis)