Human Disease

1. single-celled organisms, some of which cause disease
4. a substance that is foreign to the body and causes an immune response
6. extract from fungus that is capable of killing disease-causing bacteria
7. hair-like projections from the surfaces of some cells that by beating together cause cell movement or push external ﬂuids
10. the process in which a large cell extends its cytoplasm around a foreign object and draws it inside, later destroying it with enzymes
11. a type of white blood cell involved in adaptive immunity
13. a disease-causing organism, such as a bacterium or virus
14. any organism that lives on or in the body of another organism, the host, and gets its nutrition from the host without the host beneﬁtting
15. a small infectious pathogen that can only reproduce inside living cells

2. a specialised protein found in the plasma that binds to an antigen
3. detect cell damage and move to the site of infection, causing swelling
5. any condition that interrupts the normal organ or body function
8. a type of white blood cell that destroys invading particles by engulﬁng them
9. an enzyme found in body secretions that kills harmful bacteria by rupturing their cell walls
12. a layer of tissue (usually one cell thick) on the surface of organisms