Across
- 4. soft tissue inside bones where blood cells, including immune cells are made
- 5. proteins that recognize and neutralize specific pathogens
- 6. lymphocytes that destroy infected cells and help regulate immunity
- 7. organ that filters blood and helps fight infection
Down
- 1. small filtering structures that trap germs and activate immune cells
- 2. White blood cells that carry out most of the immune systems actions
- 3. The body’s ability to fight off diseases
- 4. lymphocytes that produce antibodies to attack invaders