Why Do We Have Blood?

Blood is the red liquid that flows through your body and each of us have about 9-12 pints in us. But what does it do and what is it made of?

TestTube Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. TestTube Plus is also offered as an audio podcast on iTunes.