Introduction to Immunology and Serology

2. Cells responsible for engulfing and digesting harmful microorganisms.
6. The body’s first line of defense that acts as a physical barrier against pathogens.
7. The largest type of white blood cell that differentiates into macrophages in tissues.
9. A weakened or inactive form of a pathogen used to stimulate an immune response.
13. Immune cells that process and present antigens to T cells to initiate an immune response.
14. White blood cells that play a key role in fighting parasitic infections and allergic reactions.
15. The process in which immune cells engulf and digest harmful microorganisms.
16. A type of blood cell involved in the body’s immune response and defense against infection.
19. Small proteins secreted by immune cells that regulate immune responses.

1. Granulocytes that release histamine and are involved in allergic responses.
3. A severe allergic reaction that can lead to life-threatening symptoms.
4. The branch of science that studies the immune system and its functions.
5. The scientist who introduced the concept of cellular immunity through phagocytosis.
6. The organ responsible for filtering blood and removing old red blood cells.
8. The scientist who discovered the ABO blood group system.
10. An organ located in the chest where T lymphocytes mature.
11. Proteins produced by B cells that help neutralize pathogens.
12. A rapid immune response that occurs upon second exposure to the same antigen.
17. The scientist who proposed the Germ Theory of Disease.
18. The scientist who developed the first successful smallpox vaccine.