Immune system

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Across
  1. 2. Single cell microorganism without nucleus
  2. 4. immobile leukocyte which plays an important role in the immunity process
  3. 6. an organism that needs to enter a cell to multiply
  4. 7. all the body’s defense mechanisms
Down
  1. 1. microorganisms must pass through our bodies
  2. 3. protein capable of specifically recognizing parts of bacteria
  3. 5. mechanism of ingestion and digestion of pathogens