The Immune System Crossword - 4th Period

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Across
  1. 2. Short-term immunity gained from introducing antibodies from another person or animal
  2. 3. A bacteria, virus, or other microorganisms that can cause disease
  3. 7. Substance prepared from killed or weakened pathogens and introduced into a body to produce immunity
  4. 9. A substance that causes an allergic reaction in an individual
  5. 11. Nonliving particle that invades and reproduces inside a living cell
  6. 12. A compound that is released by cells in response to injury and allergic reactions
Down
  1. 1. A type of blood cell that destroys disease-causing microorganisms
  2. 4. A toxin or other foreign substance that induces an immune response in the body
  3. 5. A abnormal reaction of the immune system to a foreign and frequently harmless substance
  4. 6. The ability to resist an infection or toxin, with the help of antibodies or white blood cells
  5. 8. A chemical that kills or slows the growth of bacteria, without harming blood cells
  6. 10. Immunity that results from the production of antibodies, in response to the presence of an antigen