6. What is it called when blood goes through the heart twice
- death
- double circulation
- dinner time
- once circulation
7. what direction does blood flow in an artery
- downwards
- into space
- away from the heart
- upwards
8. what colour is DEoxygenated blood
- HOLO
- purple
- blue
- red
9. how thick is a capillary
- two cells
- one cell
- 20 cells
- its too small to fit any