Across
- 5. a white blood cell that makes and releases antibodies
- 6. the person who gives blood
- 8. a type of immunity that develops in the body over a lifetime
- 9. an outbreak that affects many people at the same time
- 12. the person who receives blood
- 15. a substance that causes the production of antibodies
- 16. the clumping of red blood cells
Down
- 1. a substance created by white blood cells to attack invaders
- 2. a doctor who tests you for an allergic reaction
- 3. an outbreak that can affect an entire country or the world
- 4. a type of immunity when a large population is immune to a disease
- 7. a white blood cell which engulfs and digests intruders
- 10. a type of immunity that is present at birth
- 11. a white blood cell that identifies antigens on the macrophage
- 13. a procedure which replaces red blood cells
- 14. the watery component of blood