"The quantity of blood transmitted from the veins to the arteries, and so into the whole body, is so great that it must return to the heart."

"The blood flows from the right ventricle through the lungs to the left auricle."

"The circulation of the blood is a discovery that overthrows all the ancient doctrines of medicine."

"The heart is like a king, sitting in the middle of his kingdom, sending out commands to the periphery."

"It is not by words, but by facts and arguments, that we must seek for truth."