Immune System

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Across
  1. 4. Nodules of lymphoid tissue found in small intestine.
  2. 5. Soft, beloved organ where T-cells mature.
  3. 7. Major lymphocyte found circulating in the blood.
  4. 8. Immune response that is fast but nonspecific.
  5. 11. Bone marrow type that produces blood cells.
  6. 12. Immune cells that generate antibodies.
  7. 13. Cells involved in specific defenses.
  8. 15. Stem cell line that produces remainder of blood cells.
  9. 16. Term used to describe old, worn-out RBCs.
  10. 17. Area of spleen that contains lymphocytes.
  11. 19. Hormone produced by the thymus gland.
  12. 20. Immune response that is slower but highly specific.
Down
  1. 1. Defenses that include skin and mucous membranes.
  2. 2. Stem cell line that produces B-cells and T-cells.
  3. 3. Process of making new blood cells.
  4. 6. Immune cells that destroy virally-infected cells and cancer cells.
  5. 9. Both T-cells and B-cells respond to ___, but their response differs.
  6. 10. Largest lymphoid organ that filters blood.
  7. 14. Sets of lymphoid tissue around oral cavity.
  8. 18. Cells that secrete antibodies.