Across
- 5. cells / Attach themselves to antigens and kill them
- 9. / White blood cells
- 10. / Blood platelets
- 11. / Disease-causing microor-ganism
- 12. / Bone marrow cells with very large nuclei
- 14. / Secrete chemicals to attack disease-causing parasites
- 15. / large, single- nucleus phagocytes that ingest and dis- pose of dead or dying cells and tissues
- 17. / Makes up a large portion of the proteins in plasma
- 18. / Cells that destroy harmful pathogens
- 20. / Helps to maintain the proper amount of water in the blood
- 22. / A protein manufactured by the immune system when the immune system detects an antigen
- 23. Cells / Slow or stop the activity of B or T cells once a foreign invader has been con- trolled or destroyed
Down
- 1. / Cells involved in immune surveillance, the process of detecting and destroying foreign cells in the body
- 2. / Red blood cells
- 3. / Key protein involved in blood clotting
- 4. / Substance that is harmful
- 6. / Proteins that act as antibodies
- 7. / Plays an important role in blood clotting
- 8. / A protein that allows red blood cells to transport oxygen and carbon dioxide through the blood as the cells travel through the circulatory system
- 13. Immunity / Is the type of immunity with which you were born
- 16. / When monocytes move from the bloodstream into the body tissues
- 19. cells / Aid B lymphocytes in recognizing antigens and stimulating antibody production
- 21. active immunity / Developed when the body’s immune system is exposed to and learns to defend against one type of pathogen