Immune System Crossword

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Across
  1. 1. A white Blood Cell that can attack any invading cell or virus.
  2. 5. Stands for Human Immunodeficiency virus
  3. 7. A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
  4. 8. The largest lymphatic organ; it filters blood and removes old red blood cells
  5. 9. The circulatory system that carries cells and proteins of the immune system from one part of the body to another.
  6. 11. Chemical "messengers" that signal other immune cells to join the fight
  7. 12. A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.
  8. 13. Stage of HIV
Down
  1. 2. A type of white blood cell that is part of the immune system. There are two main types: B cells and T cells.
  2. 3. A protein component of the immune system that circulates in the blood, recognizes foreign substances like bacteria and viruses, and neutralizes them. After exposure to a foreign substance, called an antigen, antibodies continue to circulate in the blood, providing protection against future exposures to that antigen.
  3. 4. A special type of anitbody that is attached to B - Cells as apposed to floating in the Blood
  4. 6. A germ that causes disease
  5. 9. A white Blood Cell that produces antibodies
  6. 10. An organ located in the chest which instructs immature lymphocytes to become mature T-Cells