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