Across
- 3. where are substances exchanged between he blood and body cells?
- 5. what carries blood to the heart itself?
- 7. what is a group of cells in the right atrium, that sends out signals that make the heart muscle contract?
- 9. what is the process called after the blood leaves the left atrium?
- 11. what pumps blood to the body through blood vessels?
- 12. what pumps oxygen- poor blood to the lungs?
- 13. what is the tissue material that forms a wall, to separate the right atrium and the left atrium?
- 14. what is the major blood vessel from the upper body to the heart?
- 17. what is a flap of tissue that prevents blood from following backwards?
Down
- 1. what is the largest artery in the body that is attached to the left ventricle?
- 2. what carries blood back to the heart?
- 4. what is the major blood vessel from the lower body to the heart?
- 6. what is the process called after the blood leaves the right atrium?
- 8. what pumps blood out of the heart?
- 10. what pumps oxygen-rich blood to all parts of the body?
- 15. what carries blood away from the heart?
- 16. what receives blood that comes into the heart?