IMMUNOLOGY 1

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Across
  1. 4. A condition where the immune system attacks its own body.
  2. 6. The system of proteins that helps antibodies clear pathogens.
  3. 7. Proteins produced by B cells to neutralize antigens.
  4. 8. A molecule that triggers an immune response.
Down
  1. 1. White blood cells responsible for immunity.
  2. 2. An immune organ located in the chest, where T cells mature.
  3. 3. Cells that present antigens to T cells.
  4. 5. The first line of defense against pathogens.