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Text File  |  1999-11-09  |  238b  |  10 lines
  1. Lymph nodes contain large numbers of  ______ that help fight invading microorganisms. D
  2. pathogens
  3. memory cells and plasma cells
  4. erythrocytes and leukocytes
  5. lymphocytes and macrophages
  6. B cells and T cells
  7.  
  8. [#FRAME:"TRM4S4A"]
  9. NONE
  10.