The Heart is many things, but it is certainly not just a pump. We moderns have seemingly lost our faith in the heart. Before the Common Era, the heart was the seat of the emotions and the soul. It was even thought in certain cultures to be where we housed our minds.
That is simply not the case today. Science in its grand quest to know all the intricacies of the universe found the heart to be nothing more than a pump in relation to the rest of the anatomy and believed the matter closed textbook style.