Innate immunity

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Across
  1. 2. Type of adaptive immunity involving antibodies.
  2. 4. Surface marker (protein) displaying an antigen for interaction and recognition by leukocytes.
  3. 6. Type of immunity defenses already present at birth.
  4. 8. Type of immunity defenses only mounting upon exposure to a pathogen.
Down
  1. 1. Smaller substance that cannot trigger an immune response unless attached to macromolecules.
  2. 3. Any molecule or tissue that triggers an immune response.
  3. 5. Gene complex encoding the major histocompatibility complex proteins.
  4. 7. Phagocytes retaining an antigen to present on their surface.