Focus on AIDS

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Across
  1. 2. Is a protein produced when certain cells encounter an antigen.
  2. 4. identify & remember which cells to attack.
  3. 7. Is acquired immune deficiency syndrome.
  4. 8. response is the reaction to of the immune system to a foreign particle.
  5. 11. are T Cells and B Cells.
Down
  1. 1. a substance that is recognized as a foreign by the immune system.
  2. 3. infection refers to normally benign infections or virus that becomes dangerous to people with a damaged immune system.
  3. 5. are lymphocytes that produce antibodies.
  4. 6. a large group of organisms that infect plants & animals.
  5. 9. nodes are parts of the body that help prevent the spread of infection.
  6. 10. sexually transmitted disease
  7. 12. is human immunodeficiency virus.