Immunity.pptx

Types of Immunity

1. Immunity Definition and types Dr. K.Kamatchi Assistant Professor Department of Zoology Vivekananda College Tiruvedakam West

2. Synapsis Immune System – Definition Comparison - Immune system – Defense Forces. Immunity – Definition Types of Immunity Innate Immunity.

3. Immune System Defence against infection – system Formed of Lymphoid organs and immune cells.

4. Immune System and Defence Forces Pathogens - Enemies Immune response - Operation of War. Site of infection - War field. Bone marrow - Army head quarter. Thymus, Spleen, Lymph node - Training Centres. Immune cells - Soldiers. Antigen Presenting Cells - Sentries. Antibodies, Complements - Arrows and bullets.

5. Major Targets of Defence System Bacteria Viruses Fungi Protozoans Helminth Worms Worn out Cells – RBC Tissue debris – Injury Cancer Cells

6. Immunity Resistance to Infection. Recognition and disposal of non-self or foreign body.

7. Layered Defence Physical Barriers – Skin, Coughing, Sneezing – first line of defense. Innate Immunity – obtained – birth – natural defense. Acquired Immunity – developed – during life Immunological memory

8. Innate Immunity Resistance obtained – birth Natural defense Inherited – parents – young ones. Non- specific. General protective reaction – against any invasion. Effective – wide range of infectious agents.

9. It operates through following factors Physical and Mechanical Factors Biochemical Factors Cellular Factors Genetic Factors Body Temperature Inflammation Fever

10. Physical and Mechanical Factors Skin Horney outer layer – stratum corneum. Impermeable – microbes – mechanical barrier. Loss of skin – burns – infection – quickly.

11. Physical and Mechanical Factors Mucous Membrane Lining – opening – body Traps – microbes – skicky nature