| __ | 1. | Aerobic | | A. | A disease that is spread from person to person by contact |
| __ | 2. | Anaerobic | | B. | Any change that impairs/harms the function of an individual |
| __ | 3. | Bacteria | | C. | A bacterium, virus, or microorganism that can cause disease |
| __ | 4. | Capsule | | D. | A non-cellular pathogen |
| __ | 5. | Contagious disease | | E. | Single celled micro-organisms with no membrane-bound nucleus |
| __ | 6. | Disease | | F. | Thin appendages that allow bacterium to move |
| __ | 7. | Flagella | | G. | Slimy gelatinous material around some bacterium |
| __ | 8. | Pathogen | | H. | Grow and reproduce in the presence of oxygen |
| __ | 9. | Vector | | I. | Grow and reproduce in the absence of oxygen |
| __ | 10. | Virus | | J. | Animals that carry pathogens from one host to another |
| __ | 11. | Antibiotics | | A. | Production of specialised cells and antibodies |
| __ | 12. | Antibodies | | B. | Barrier to infection with no memory of prior infection |
| __ | 13. | Antigen | | C. | Compound that inhibits the growth or destroys microorganisms |
| __ | 14. | Cytokines | | D. | A material that triggers a response from B and T cells |
| __ | 15. | Immunoglobulins | | E. | Chemical substances that the body recognises as alien |
| __ | 16. | Interferon | | F. | Proteins that identify antigens |
| __ | 17. | Non-specific immunity | | G. | Protein molecules that act as messengers between cells |
| __ | 18. | Specific immunity | | H. | Secreted by some cells when they are infected by viruses |
| __ | 19. | Vaccine | | I. | Contain dead or treated organisms to induce immunity |