The immune system recognizes and eliminates foreign substances like microbes. It protects the body from old, damaged, and infected cells. The immune system has two branches - innate nonspecific immunity that acts quickly, and adaptive specific immunity that is highly targeted and develops memory. Antigens are substances that trigger immune reactions, while adjuvants enhance immune responses to antigens. Lymphocytes and accessory cells like macrophages and dendritic cells carry out immune functions in lymphoid organs like lymph nodes, spleen, and Peyer's patches.

1. Immunology-introduction

8. Antigen and epitope

11. Immunogenicity of hapten

13. Cross reactivity of antigens Benjamini E, Leskowitz S. 1988

17. Majority of immune system cell originate in bone marrow Roitt/Broskoff/Male: IMMUNOLOGy, 4th ed

18. Lymphocyte – central cell of the immune system

19. Auxiliary cells of the immune system

21. Antigen- presenting cells

22. Organs of the immune system Roitt/Broskoff/Male: IMMUNOLOGy, 4th ed

23. Lymph node Roitt/Broskoff/Male: IMMUNOLOGy, 4th ed

24. The Spleen

25. Histology of the Spleen Roitt/Broskoff/Male: IMMUNOLOGy, 4th ed

26. Payer ´s Patches

27. Circulation of lymph o cytes in the body

28. Circulation of Lymphocytes in the body The role of High Endotelial Venules Roitt/Broskoff/Male: IMMUNOLOGy, 4th ed