Immune system

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Across
  1. 1. type of barrier that includes oils, Acids, and tears
  2. 3. where T cells are made
  3. 5. Bacteria or virus that causes disease
  4. 6. neutralizes specific pathogens
  5. 8. primary form of defense
Down
  1. 2. no longer affected by a specific pathogen
  2. 4. produces antibodies
  3. 7. directly kill pathogens