Across
- 5. simple, single-celled microorganisms that can live almost anywhere
- 7. the body's response to injury
- 8. disease caused by organisms that enter, live in, and multiply within the human body
- 9. can only be seen through a microscope
- 10. your body's last and most sophisticated line of defense against pathogens
- 12. organism that causes disease
- 14. a serious infection of the lungs
- 15. immunity that is acquired by receiving antibodies from another immune system
- 16. a viral infection that causes the lymph nodes, tonsils, and spleen to become swollen and tender
Down
- 1. immunity that your own immune system creates
- 2. your body's ability to destroy pathogens that it has previously encountered before the pathogens are able to cause disease
- 3. yellowing of the skin
- 4. a highly contagious bacterial infection that most often affects the lungs
- 6. tiny hairlike structures that line your air passages
- 8. injection that causes you to become immune to a disease
- 11. a network of vessels that collects fluid from the tissues of your body and returns it to the bloodstream
- 13. inflammation of the liver