When does the heart beat?—"All the time."
What happens when the heart stops beating?—"We die."
What do you see on the back of your hand, beneath the skin?—"Veins"
What is in the veins?—"Bad blood."
What are the veins?—"Pipes for the bad blood to pass through."
Where do the veins carry the bad blood?—"To the heart."
Where does the heart send the bad blood?—"To the lungs."
What happens to the bad blood when in the lungs?—"It is made pure."
What makes the bad blood pure?—"The air."
How does the air get into the lungs?—"Through my nose, mouth, and windpipe."