In this volume, our heroes Geo and Dr. Brain face hostile white blood cells, Phoebe's powerful heartbeat, and a bruise that threatens to suck them out of the bloodstream and leave them stranded forever! As you follow their fast-paced comic adventure through Phoebe's blood, heart, and lungs, you'll learn all about the human circulatory system.

Have you ever wondered...
-How your heartbeat keeps a steady pace?
-Why your blood forms a scab after you get a cut or scrape?
-How your body defends itself against bacteria and other intruders?
-How children inherit their blood types from their parents?
-How your muscles and brain get the oxygen and nutrients they need to survive?
-How the body filters out toxins in food before they reach your bloodstream?

For ages 8+

Translated by Army Chung