Across
- 6. The two upper chambers of the heart
- 7. Yellow liquid part of the blood
- 8. Smaller that red blood cells
- 10. Blood vessels that carry blood back to the heart
- 11. Iron-containing substance in red blood cells
Down
- 1. The powerful lower chambers of the heart
- 2. The movement of blood through the vessels
- 3. Small vessels connecting arteries and veins
- 4. The four divisions of the heart
- 5. Measurement of your heartbeat
- 6. Blood vessels that carry blood away from heart
- 9. Works like a door that opens in one direction only