Across
- 3. a long lived immune cell
- 5. blood vessel which travels toward the heart
- 6. white blood cell which engulfs the pathogens
- 8. top heart chamber
- 9. bottom heart chamber
- 10. the main artery that carries blood away from the heart, connects to the left ventricle
- 12. vessels from the lungs to the heart
Down
- 1. a harmful microorganism
- 2. something the body identifies as non-self
- 4. creates antibodies, can turn into memory cells
- 5. the main veins that carry deoxygenated blood from the body back to the heart
- 7. blood vessel which travels away from the heart
- 10. Y-shaped protein which is complementary to a specific type of antigen
- 11. thin blood vessel branched throughout the body