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Immune System.pptx

  1. • Pathogens- Foreign invaders that enter the immune system and cause an immune response. • Also known as Antigens – Bacteria – Viruses – Fungi – Protists Streptococcus Bacteria Rhinovirus Amoebic Dysentery
  2. • Pathogens have tags surrounding them called that indicate that they are invaders to the body Bacteria Antigens
  3. • Antigen - any substance that the body regards as foreign (virus, bacterium, toxin) • Antibody - a disease fighting protein developed by the body in response to the presence of an antigen • Antigen-antibody reaction or immune reaction
  4. – Phagocytes (macrophage )- phagocytic (surrounds and engulfs) protects body by ingesting invading cells – Lymphocytes – Cells that produce specific antibodies against a foreign pathogen •Leukocytes- Another name for white blood cells, there are two general classes of leukocytes
  5. – mature in thymus gland – Cell mediated immunity – mature in bone marrow – antibody-mediated immunity
  6. • Any change other than injury that disrupts the normal functioning of the body. Some diseases are inherited, some are caused by environmental factors, and other are caused by agents such as bacteria, viruses, parasites and fungi.
  7. • The human body provides the right conditions for pathogens. We provide them with the right temperature, watery environment nutrients
  8. • Skin – Barrier – Provides and acidic environment
  9. All contain Lysozymes which destroy bacteria and viruses
  10. • The Immune System- bodies primary defense against pathogens • Pathogens are disease causing microbes
  11. What do you think happens to the number of white blood cells in the area?
  12. 27
  13. 28
  14. An autoimmune reaction attacks the insulin producing cells of the pancreas