“There is her heart. I’ve never seen one beating. I had no idea they moved so much. You put your hand on your heart and you picture something pulsing slightly, but basically still, like a hand on a desktop tapping Morse code. This thing is going wild in there. It’s a mixing-machine part, a stoat squirming in its burrow, an alien life form that’s just won a Pontiac on The Price Is Right. If you were looking for the home of the human body’s animating spirit, I could imagine believing it to be here, for the simple reason that it is the human body’s most animated organ.”
-from Stiff: The Curious Lives of Human Cadavers