Immune System

2. a blood protein produced to counteract a specific antigen
6. a tube that carries lymphatic fluid through the lymphatic system
8. inability to produce an adequate immune response due to an absence of antibodies or immune cells
9. the process of adaptive immunity defense that depends on the action of antibodies
10. a soft substance in the cavities of bones where white blood cells are produced
12. molecule that stimulates an immune response
13. an immune system response, where body temperature rises
14. a class of proteins that function as antibodies
15. small proteins that control the growth and activity of other immune system cells
16. a disease causing organism, including bacteria
17. a small organ in the upper chest where lymphocytes are produced
18. a structure that filters substances that travel through the lymphatic fluid

1. a substance used to stimulate the production of antibodies
3. unicellular microorganism that doesn’t have a distinct nucleus
4. a type of blood cell that help the body fight infection and disease
5. a subsystem that is composed of specialized cells that eliminate pathogens or limit their growth
7. an infectious agent that replicates in the living cells of an organism
8. the defense system you were born with
11. an organ that makes lymphocytes, filters blood, stores blood cells, and destroys old blood cells
18. a type of blood cell that is made in the bone marrow