Wonderful World of Blood

Each of us carries within us eight pints of an extraordinary liquid – blood. It makes up 10% of our body weight and is vital to our survival. But how much do we really know about this sticky, red substance and its mysterious, life-giving force? This fascinating film sees Michael Mosley put himself through some extreme challenges to discover how our blood protects us from infection, heals us when we’re wounded, and powers our lives.