"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."

"It is only when we have satisfied ourselves by careful dissection that we can truly understand the nature of things."

"I appeal to the evidence of my senses, and to the testimony of dissections."

"I began to think whether there might not be a motion as it were in a circle."

"I profess both to learn and to teach anatomy not from books but from dissections; not from the tenets of philosophers but from the fabric of nature."