Immune System

3. Single-celled organisms that lack a nucleus; prokaryotes - diseases: strep throat, food poisoning, pneumonia.
5. A form of immunity in which the body produces its own antibodies against a disease/infection.
6. Immunity that is present before exposure and effective from birth.
10. Some bacteria are beneficial: breaking down our food, gut health, and fights off harmful bacteria.
11. Lymphocytes, antigens, antibodies, Memory B and T cells that recognize the pathogen if it invades again.
12. The immunities we acquire throughout our lives.
13. System composed of a network of vessels, ducts, nodes, and organs. Provides defense against infection.
16. Macrophages and inflammatory responses (fever, swelling, redness, heat, and pain.)
17. A complex response system that protects the body from bacteria, viruses, and other foreign substances.
18. Cells created in the thymus that produce substances that attack infected cells in the body.
19. A tiny, nonliving particle that invades and then reproduces inside a living cell.

1. The short-term immunity that comes from the antibodies from another person or animal.
2. Found within the lymph node; they destroy bacteria, cancer cells, and other foreign matter in the lymphatic stream.
4. Specialized proteins that aid in destroying infectious agents.
7. Foreign substances that trigger the attack of antibodies in the immune response.
8. Organisms that cause disease.
9. External barriers: skin and mucous membranes.
14. Contamination or invasion of body tissue by pathogenic organisms.
15. Cells manufactured in the bone marrow that create antibodies for isolating and destroying invading bacteria and viruses.