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6. Platelets are involved in the immune system
7. Which of the following is true about the Vena Cava...
- it takes blood to the lungs
- takes oxygenated blood to the rest of the body
- Enters the heart via the right atrium
- it is an artery
8. Plasma is around 55% water
9. The human circulatory system is...
- a double circulatory system
- a single circulatory system
- a triple circulatory system
- a quadruple circulatory system
10. Blood from the Left Hand Side of the heart must be carrying deoxygenated blood
11. Deoxygenated blood and oxygentated blood DO NOT mix