From the Inside Cover
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?
