Across
- 2. Relating to the lungs
- 3. Smallest blood vessel
- 7. Type of blood cells that fight infection
- 9. Type of blood cells that contain haemoglobin for gas transport
- 10. type of blood cell that clots blood
- 12. Chamber at the top of the heart
Down
- 1. Chamber at the bottom of the heart
- 4. Blood vessel that transports blood away from the heart
- 5. Blood vessel that transport blood back to the heart
- 6. Largest artery in the body
- 8. Liquid part of blood
- 11. Heartbeat is controlled by the _____ stem