Antigens

1. Nonspecific Defence Systems: Skin; Mucous membranes; phagocytes; natural killer cells; interferon; complement

2. Actions: Guard against nearly any foreign agent; act to impede or destroy foreign agents

3. Specific Defense Systems

4. First time Contact: Primary Immune Response

5. Secondary immune response: subsequent contact with same antigen stimulates rapid division of

6. PHAGOCYTES

7. Engulf antigens and present them to

8. HELPERT LYMPHOCYTES

8.1. Humoral Immune Response

8.2. Cell-mediated immune reponse

9. Secrete Lymphokines

10. Activate and stimulate divisions of

11. T Lymphocytes

12. B Lymphocytes

13. Produce

14. Produce

15. Killer T Lymphocytes

16. Memory T Lymphocytes

17. Actions: Destroy Infected cells by disturbing the cell's plasma membrane

18. Plasma Cells

19. Memory B Lymphocytes

20. Secrete

21. Antibodies

22. Actions: Aid in destruction of bacteria and some viruses by the process of agglutination