"I looked up Leonardo [Leonardo Da Vinci The Anatomy of Man: Drawings from the Collection of Her Majesty Queen Elizabeth II] to see what Leonardo found. Leonardo... showed also that the heart had these different cavities with different sizes. ...[H]e said "The apex, or tip of the heart comprises the left ventricle." ...[T]hat ...is the vortex. And then Leonardo made these fabulous drawings ...and he looked at the aorta, and he found as the blood came out it goes in reciprocal spirals going in different directions. ...[H]e said that's how the blood flows."