We all have blood inside us. It is constantly on the move, traveling around your body carrying all sorts of useful things the body needs. Blood is vital for life. We can't live without it, so the body tries to keep blood safe and clean inside it. This engrossing guide to blood explores the structure, uses, and lifecycle of blood, covering everything from why we grow scabs over cuts to why people donate blood at hospitals.

Includes index.

What Are Blood Groups? -- What Does the Heart Do? -- How Does Blood Move Around the Body? -- What is Pus? -- What is a Scab? -- What is a Bruise? -- How Does the Body Keep Blood Clean? -- What is Anemia? -- What IS Hemophilia? -- What is Leukemia? -- What is a Blood Transfusion? -- Why Do People Give Blood?.