Across
- 2. Binds to haemoglobin and transported around the body
- 4. passes out of the body when breathing out
- 6. blood that is blue on a diagram
- 8. Largest vein in the human body
- 11. Largest artery in the human body
- 12. Type of circulatory system that mammals have
- 13. Hollow cavity in the centre of blood vessels
- 14. Carry blood away from the heart at high pressure
- 15. take oxygen in from the atmosphere
Down
- 1. Type of circulatory system that fish have
- 3. Red liquid that circulates in the body
- 5. blood that is red on a diagram
- 7. number of chambers in the heart
- 8. Stop blood flowing the wrong way
- 9. Have the largest lumen out of the blood vessels
- 10. Pumps blood around the body