Stickmen's guide to your beating heart By John Farndon Illustrated by Venitia Dean
By the time you’re 30 years old you will have breathed in about 300 decillion oxygen molecules
Contents Your Beating Heart Breathing Blood Circulation Heartbeat Arteries and Veins How Cells Breathe What Is Blood Blood in Action Mending Hearts Staying Fit Speaking and Singing The History of the Heart More Hearty Facts Index 6 8 10 12 14 16 18 20 22 24 26 28 30 32
