Immune System

7. Part of the body's defense against pathogens
8. Drug used to treat allergies
10. a toxin or other foreign substance which induces an immune response in the body
11. an infective agent that typically consists of a nucleic acid molecule in a protein coat
12. a blood protein produced in response to and counteracting a specific antigen
16. severe response to a foreign substance such as a drug
17. contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body
20. a member of a large group of unicellular microorganisms which have cell walls

1. contaminated with an infective agent
2. A chemical produced in the pancreas that enables the body's cells to take in glucose from the blood and use it for energy
3. a bacterium, virus, or other microorganism that can cause disease
4. an organism that lives in or on an organism of another species
5. A chemical that kills bacteria or slows their growth without harming body cells
6. treatment to produce immunity against a disease
9. system that fights off disease
13. the branch of medicine and biology concerned with immunity
14. main organ that filters the blood
15. responsible for producing antibodies to antigens
18. relating to or denoting substances that prevent the growth of disease-causing microorganisms
19. uncontrolled division of abnormal cells in a part of the body