Immune System

3. Network of organs, cells and proteins that defends the body against infection
8. Getting rid of certain pathogens that have been encountered by the immune system.
10. Substances that are capable of killing and stopping growth of specific bacteria.
11. When bacteria becomes immune to antibiotics.
16. A microorganism that infects cells and may cause disease.
17. When the body is given immunity to a disease by intentional exposure.
18. When a person is given antibodies to a disease rather than producing them.
19. Helps the body fight infection and other diseases.
20. Protective proteins produced by your immune system.

1. When the reproduction of viruses using a host cell to manufacture more viruses.
2. Phage infects a bacterium and inserts its DNA into the bacterial chromosome.
4. Tissues and organs that work together to protect the body.
5. Exposure to a disease that triggers the immune system to produce antibodies.
6. Cells involved in the detection, phagocytosis and destruction of bacteria.
7. Engulfing and destroying foreign particles
9. Immunity that is naturally existing
12. Giving medicine to the body to produce protection from a specific disease.
13. A substance that causes the body to be immune against that substance.
14. Physical and chemical barriers that defend the body from infection.
15. Cells that are formed in the bone marrow from stem cells that give rise to all blood cells.