1. Haemophiliacs lack a major agent in their plasma which helps the blood to clot. If your blood doesn't clot, you keep on bleeding. What is this agent called?
   
   • Max Factor
   • Factor VIII
   • The X factor
2. Dr Karl Landsteiner of Vienna discovered that blood comes in four different groups. He got the Nobel Prize for his discovery. Ironically he died of what?
   • A blood clot
   • Pneumonia
   • Old age
3. How many red blood cells are there in one litre of blood?
   • 5 thousand
   • 5 million
   • 5 trillion
4. Which blood group is the most common?
   • O
   • A
   • B
5. How much blood does the average adult human body contain approximately?
   • 1 litre
   • 5 litres
   • 10 litres
6. Human blood is red due to the presence of iron. Octopuses’ (and other molluscs) blood is blue when charged with oxygen. This is due to the presence of which element?
   • Copper
   • Carbon
   • Iron
7. For many centuries, blood-letting was a common medical treatment for a range of illnesses. What creature did they use for this purpose?
   • Kitten
   • Whelk
   • Leech
8. What is the main artery carrying blood from the heart to the rest of the body?
   • Aorta
   • Pulmonary artery
   • Pulmonary vein
9. O negative blood is the only blood type that can be given safely to ANYONE. People who have 0 negative blood are very rare. What are they called?
   • Infrequent donors
   • Universal donors
   • Unusual
10. Where are blood cells produced?
    • The heart
    • The brain
    • The bone marrow

If we’ve given you a taste for blood check out our profile of Richard Drew, one of our 10 inspiring lives and father of the blood bank and to experience what it’s like to be an alien bug in the body’s blood stream try our bloodbug game.

Also if you are a sucker for a sucker visit the vampire cellar in the Goth House!