Across
- 2. The organ that pumps blood
- 4. Blood vessel that carries blood to the heart
- 6. Cell fragment that helps clot blood
- 9. Red liquid flowing through veins and arteries
- 10. The system that lets you breathe
- 12. Muscle under lungs that helps you breathe
- 13. The system that moves blood around the body
- 15. Blood vessel that carries blood away from the heart
Down
- 1. Tiny blood vessel where exchange happens
- 3. Tiny air sacs in the lungs
- 5. The pale liquid part of blood
- 7. Windpipe carrying air to lungs
- 8. Tubes that branch into the lungs
- 11. Gas you breathe in
- 14. Organs that fill with air when you breathe