The blue whale has a heart the size of a small car and its blood vessal is so broad, that a person could swim through it. See more

Blood is about 78 percent water. See more

Your system of blood vessels is over 60,000 miles long. That's long enough to go around the world more than twice! See more

Duelling is legal in Paraguay as long as both parties are registered blood donors. See more

It has been calculated that a single breath from a mature blue whale can inflate up to 2000 balloons. See more

Blue and fin whales can create the loudest sound by animals ever recorded. See more

A tuna called the 'Blue Fin' can be sold for over $20,000 around the world. See more

It takes about 20 seconds for a red blood cell to circle the whole body. See more