Immune System Crossword Puzzle

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Across
  1. 3. tiny, one-celled organisms that live nearly everywhere
  2. 6. a disease that can be passed to a person from another person, animal, or object
  3. 7. a kind of lymphocyte that is produced in the thymus gland and attack pathogens directly and stimulate production of b cells
  4. 10. a kind of lymphocyte that is formed in bone marrow and releases antibodies
  5. 12. a disease or condition that is regularly found among particular people or in a certain area
  6. 13. a disease that is not contagious
  7. 15. a secondary circulatory system that helps the body fight pathogens and maintain its fluid balance
  8. 17. a person who studies or specializes in medicine which deals with the incidence, distribution, and control of disease
  9. 18. white blood cells produced by the lymphatic system
Down
  1. 1. your body's ability to resist the germs that cause a particular disease
  2. 2. proteins that attach to antigens, keeping them from harming the body
  3. 4. the smallest disease-causing organism
  4. 5. a condition that occurs when pathogens enter the body, multiply, and damage cells
  5. 8. tiny organisms that cause communicable diseases
  6. 9. a disease that is spread over a whole country or the world
  7. 11. a widespread occurrence of an infectious disease in a community
  8. 14. a combination of body defenses made up of cells, tissues, and organs that fight off pathogens and disease
  9. 16. substances released by invading pathogens