6. What colour is blood plasma?
- Yellow
- Red
- Purple
7. The arteries...
- carry blood all around the body
- carry blood away from the heart to the organs
- carry blood from the organs to the heart
8. What is the name of the arteries which supply the muscles with oxygen?
- Coronary arteries
- Moronary arteries
- Vonoray arteries
9. What are stents used for?
- To open up arteries and prevent blood clotting
- To let the blood flow faster
10. Is it called a 'double circulation system' because blood flows in two directions?
- True
- False
