The immune system

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Across
  1. 2. a type of white blood cells which are not phagocytes, they attack cancer cells by releasing chemicals that promote programmed cell death.
  2. 6. cells that may confer life long immunity.
  3. 7. a syndrome that results from infection by HIV.
  4. 10. proteins produced by virus-infected cells.
  5. 11. white blood cells that spend most of their time in the tissue and organs of the lymphatic system.
Down
  1. 1. hyper-intensive responses can occur in many parts of the body including nasal passages, bronchi, and skin.
  2. 3. drugs that interfere with histamine's action in which they provide temporary relief and often make people drowsy.
  3. 4. a type of lymphocytes that attacks cells infected with bacteria or viruses.
  4. 5. an immune response that occurs upon first. exposure to an antigen is called:
  5. 8. responds to foreign molecules is called:
  6. 9. first line of defense against potential invaders.