A&P Ch. 23-24 bonus puzzle

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Across
  1. 3. The primary organ responsible for the maturation of T cells
  2. 7. The fluid that circulates through the lymphatic system
  3. 9. A specialized cell that presents antigens to T cells
  4. 13. A condition characterized by a deficiency of red blood cells or hemoglobin
  5. 14. Small proteins released by cells to communicate with and regulate the immune system
  6. 15. A hormone that stimulates red blood cell production
  7. 17. The largest lymphatic organ involved in the filtration of blood and immune system activation
  8. 18. The protein responsible for carrying oxygen in red blood cells
  9. 20. The process by which white blood cells move towards the site of infection
Down
  1. 1. The most numerous type of white blood cell
  2. 2. The first line of defense in the immune system, including physical and chemical barriers
  3. 4. The process of blood cell formation
  4. 5. The iron-containing pigment in red blood cells that binds to oxygen
  5. 6. The liquid component of blood
  6. 8. The process of stopping bleeding or hemorrhage
  7. 10. A cell fragment involved in blood clotting
  8. 11. A type of white blood cell that engulfs pathogens
  9. 12. Protective proteins produced by B cells in response to specific antigens
  10. 16. A type of lymphocyte that directly kills infected cells
  11. 19. The percentage of blood composed of red blood cells