Immune system

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Across
  1. 6. Medicine that kills pathogenic microorganisms.
  2. 7. An organism that takes nourishment from a host.
  3. 8. Also called leukocytes.
  4. 9. Resistance from a pathogen.
  5. 11. An agent that causes disease.
  6. 12. A single or multi-cellular decomposing organism.
Down
  1. 1. Responsible for clotting blood.
  2. 2. The study of the immune system.
  3. 3. Proteins made by plasma cells that break down pathogens.
  4. 4. Cannot grow or reproduce outside of a cell.
  5. 5. Where the immune system attacks healthy cells.
  6. 10. Used to prevent against infection.