Across
- 3. Upper chambers of the heart
- 7. System that carries nutrients and oxygen throughout the body
- 9. Bottom chambers of the heart
- 11. Your blood is 55% of this
- 13. A type of gas waste your veins carry to get rid of
- 14. Cell that connects to other platelets to form a scab
Down
- 1. Cells that fight off germs
- 2. Tubes where arteries drop off and veins pick up red blood cells
- 4. Act as "Doors" for the heart
- 5. Red blood cells carry this
- 6. Organ that pumps blood throughout the body
- 8. Cell that carries oxygen
- 10. Red blood cells collect oxygen from these
- 12. Tube that transports red blood cells to the heart
- 15. Tube that transports red blood cells away from the heart