Immune System

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Across
  1. 2. A dangerous immune response to a safe substance
  2. 3. When a virus or microorganism enters the body
  3. 4. Which is not a germ? bacteria/virus/antibody
  4. 6. Common microscopic organisms
  5. 7. An increase in body temperature when sick
  6. 8. The immune system keeps us healthy
  7. 9. Very small things that often cause infections
Down
  1. 1. The outer covering of the body
  2. 2. Proteins that help get rid of infections
  3. 3. Germs do this and make us sick
  4. 5. A body system that works to keep the organism healthy