Jerry, Elaine, and George are eating at a restaurant, and George claims he is having a heart attack. Jerry and Elaine don't believe him, especially because his claims of being in a dire situation in the past were invalid. After some time, they realize he is actually suffering and call for help.
Beakman explains why we have a heart and uses some short clips to show what a heart is and what it does. Then he uses and clogged sink to explain what a clogged artery is and various ways to fix it. He covers an angioscope and heart bypass surgery.
Beakman explains what the heart is and how it works using a model and an animated clip. He shows how it contracts to move blood around and that the blood carries nutrients and oxygen to all of your cells.
Tuck travels quickly through the bloodstream because Jack's heart rate has increased from being pursued by some villains. Tuck tries to stop his vehicle and avoid entering the heart through the tricuspid valve, which could be fatal to Jack.