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