Across
- 2. Carries blood from the head to the heart
- 6. Contains antibodies for a specific pathogen
- 7. A harmful organism that gets into the body
- 9. Carries blood away from the heart
- 10. Carries blood towards the heart
- 11. The main organ that transports blood
- 13. Single celled organisms
- 14. most common type of blood cell
Down
- 1. carries blood to the cells, very small
- 3. A protein produced by the immune system
- 4. chamber that receives blood into the heart
- 5. A white blood cell that produces antibodies
- 8. Attach themselves to antigens
- 9. Largest artery
- 10. chamber that pumps blood out of the heart
- 12. A white blood cell that digests pathogens