"It is almost as if the flow of blood has carved out the shape of the heart in evolutionary time. The chambers of the heart are shaped in such a way that the blood swirls around in the direction that the heart requires. Even the vast loop of blood made as it flows around the heart means that as the main pumping chamber recoils this helps the upper chamber refill with the next batch of blood. And part of this astonishing beauty of the heart had been glimpsed by Leonardo da Vinci."
This quotation is taken from a clip from a BBC television programme Heart vs Mind: What Makes Us Human? First broadcast 10th July 2012
To see the clip Bloodflow in three dimensions on BBC iPlayer (in which Dr Philip Kilner is featured) clickhttp://www.bbc.co.uk/programmes/p00vpyyv