Your body’s a lean, mean blood-making machine! By the time you finish reading this sentence, your body will have produced 10 million new blood cells. Good thing, too, since 10 million OLD ones died in those few seconds as well. Your body even recycled parts of those old cells to help make new ones. How’s that for efficient?

Discover how much blood you have, what your heart does, how your organs clean your blood and much more. Open this book to learn all about blood and your amazing circulatory systems — it gives a whole new meaning to “go with the flow”!