Across
- 6. results when exposure to a disease organism triggers the immune system to produce antibodies to that disease
- 9. happens when germs like bacteria and fungi develop the ability to defeat the drugs designed to kill them.
- 11. a group of cells, tissues and organs that work together to protect the body
- 12. A complex network of cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases.
- 15. A type of white blood cell.
- 16. A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.
- 17. infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.
- 18. a method by which a virus can replicate its DNA using a host cell.
- 19. used to attack invading bacteria, viruses, and toxins.
Down
- 1. physical and chemical barriers that are always ready and prepared to defend the body from infection.
- 2. acquired from exposure to the disease organism through infection with the actual disease.
- 3. A type of immune cell that can surround and kill microorganisms, ingest foreign material, and remove dead cells.
- 4. The act of introducing a vaccine into the body to produce protection from a specific disease.
- 5. provided when a person is given antibodies to a disease rather than producing them through his or her own immune system.
- 7. eliminating specific pathogens that have been encountered by the immune system previously
- 8. a mean by which the body is given immunity to a disease by intentional exposure to small quantities of it.
- 9. A drug used to treat infections caused by bacteria and other microorganisms.
- 10. A type of white blood cell that makes antibodies.
- 13. Any substance that causes the body to make an immune response against that substance.
- 14. the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell.