Across
- 4. happens when germs like bacteria and fungi develop the ability to defeat the drugs designed to kill them
- 12. a complex network of cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases
- 13. a method by which a virus can replicate its DNA using a host cell
- 14. the act of introducing a vaccine into the body to produce protection from a specific disease
- 16. a type of white blood cell that makes antibodies
- 17. a type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells
- 18. an infectious microbe consisting of a segment of nucleic acid surrounded by a protein coat
- 19. provided when a person is given antibodies to a disease rather than producing them through his or her own immune system
Down
- 1. physical and chemical barriers that are always ready and prepared to defend the body from infection
- 2. a drug used to treat infections caused by bacteria and other microorganisms
- 3. results when exposure to a disease organism triggers the immune system to produce antibodies to that disease
- 4. a protein made by plasma cells in response to an antigen
- 5. acquired from exposure to the disease organism through infection with the actual disease
- 6. a type of immune cell that can surround and kill microorganisms, ingest foreign material, and remove dead cells
- 7. a mean by which the body is given immunity to a disease by intentional exposure to small quantities of it
- 8. a type of immune cell that is made in the bone marrow and is found in the blood and in lymph tissue
- 9. any substance that causes the body to make an immune response against that substance
- 10. the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell
- 11. a type of white blood cell
- 15. a cell that is part of the immune system and helps the body fight infections and other diseases