Across
- 3. proteins made by B lymphocytes
- 5. the body's defense against infections
- 8. immunity everyone is born with
- 10. white blood cells that help the body remember and destroy invader
Down
- 1. white blood cells
- 2. a way to introduce an antigen without getting someone sick
- 4. foreign substances
- 6. destroy antigens
- 7. white blood cells that chew up invading organisms
- 9. immunity that develops throughout our lives