Youve seen your own blood when you have a cut or a scrape. You can see theveins in your wrist and youve seen the scab that forms as a cut heals. But doyou know ... » 

Youve seen your own blood when you have a cut or a scrape. You can see theveins in your wrist and youve seen the scab that forms as a cut heals. But doyou know what blood does for you? Without blood you couldnt play or grow orlearn. Thats because just about every part of your body needs blood from yourmuscles to your bones to your brain. How does your body use blood? Read andfind out Ages 10 14 «