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