Blood and Immune Systems

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Across
  1. 7. condition of absence of a spleen
  2. 8. abnormal reduction of clotting cells (platelets)
  3. 10. suspension of inactivated microorganisms administered by injection, mouth, or nasal spray to prevent infectious diseases by inducing immunity
  4. 12. systemic infection
  5. 13. blood test to measure the volume of erythrocytes
  6. 14. formation of bone marrow
Down
  1. 1. decrease in white blood cells
  2. 2. inflammation of the adenoids
  3. 3. tumor of the thymus gland
  4. 4. malignant disease characterized by excessive increase in abnormal leukocytes formed in the bone marrow
  5. 5. pertaining to the thymus
  6. 6. process in which some of the white blood cells destroy the invading microorganisms and old cells
  7. 9. a life-threatening reaction to a previously encountered antigen
  8. 11. pertaining to the destruction of blood cells
  9. 12. surgical removal of the spleen