THE THREE LINES      OF   DEFENCE
There are “Three lines of Defense” that all  contribute to the Immune System ,each animportant part in the destruction of ...
First Line    ofDefense
Skin Thick layers of Skin make     the penetration ofPathogens nearly Impossible
The First Line of DefenseSweat and Oil on your skin kill most Pathogens they come in  contact with due to the fact that yo...
Mucus Membranes
Thick walls of Mucus line your Nose, Throat , and Stomach. Mucus acts as a kind of glue that traps any Pathogens that happ...
SecretionMucusTearsSalivaSweat
The various secretions push  out pathogens and alsocontains a chemical called   Lysozyme that breaks  through the cell wal...
Mucus
Tears
Saliva
Sweat
Second line    of  Defense
Innate Immune      ResponseThere are four important non-specific (Innate) defenses that comeinto action once a pathogen ha...
The Inflammatory    ResponseA series of events thatrepress infection and speedhealing through dilation ofblood vessels.
Histamines dilate blood vessels and bring whiteblood cells to the area of  infection thus causing      Inflammation
Swelling ,Redness, and Puss      may also occur (Puss—A build up of millions of dead         white blood cells )
Temperature  ResponseTo fight pathogens the body will raise its temperature a coupledegrees above normal to try and       ...
Fever helps to combat bacteriadue to the fact that Pathogens     cannot survive high        temperatures.
Proteins  A variety of proteins provide a non-specificdefense from Pathogens
Interferon is a protein releaseby cells infected with a virus. (Its causes nearby cells to create an enzyme that prevents ...
White Blood Cells       (Phagocytes)Neutrophils , macrophages and natural killer cells wait within   tissue for pathogens ...
Neutrophils overwhelm anddestroy pathogens by sacrificingthemselves for wellbeing of the       rest of the body
Macrophages consume and  kill pathogens as well asclear the body of dead cells          and debris.
Natural killer cells puncture   the cell membranes ofpathogens, allowing liquid to rush in and make the cell            bu...
The Third Line     of   Defense
Acquired Immune      Response   The 3rd line of defense is Called “TheAcquired Immune Response” is a specific  Immune resp...
Helper T-Cells activateboth cytotoxic T cells and         B cells
Helper T-Cell
The helper T Cells   recognize Virus’s that would otherwise go un-noticed. It then alerts the  B-Cells. The B cells first ...
After the Virus is smothered   in antibodies and cannot  infect anything other cellsthe killer t cells are called to  the ...
Armed Memory B-Cell
Antibodies are Immune System proteins that  destroy pathogens
The End!!!By:Johnathan Baekgaard
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
Immune system
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Immune system

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Immune system

  1. 1. THE THREE LINES OF DEFENCE
  2. 2. There are “Three lines of Defense” that all contribute to the Immune System ,each animportant part in the destruction of Pathogens(Pathogens are any foreign substance found in the body that causes anImmune Response)
  3. 3. First Line ofDefense
  4. 4. Skin Thick layers of Skin make the penetration ofPathogens nearly Impossible
  5. 5. The First Line of DefenseSweat and Oil on your skin kill most Pathogens they come in contact with due to the fact that your Sweat is acidic.
  6. 6. Mucus Membranes
  7. 7. Thick walls of Mucus line your Nose, Throat , and Stomach. Mucus acts as a kind of glue that traps any Pathogens that happen to be going by . The Cilia (little hairs) then move the Pathogen filled Mucus out of the body
  8. 8. SecretionMucusTearsSalivaSweat
  9. 9. The various secretions push out pathogens and alsocontains a chemical called Lysozyme that breaks through the cell walls of Bacteria therefore killing them.
  10. 10. Mucus
  11. 11. Tears
  12. 12. Saliva
  13. 13. Sweat
  14. 14. Second line of Defense
  15. 15. Innate Immune ResponseThere are four important non-specific (Innate) defenses that comeinto action once a pathogen hasentered the body.Inflammatory ResponseTemperature ResponseProteinsWhite Blood Cells
  16. 16. The Inflammatory ResponseA series of events thatrepress infection and speedhealing through dilation ofblood vessels.
  17. 17. Histamines dilate blood vessels and bring whiteblood cells to the area of infection thus causing Inflammation
  18. 18. Swelling ,Redness, and Puss may also occur (Puss—A build up of millions of dead white blood cells )
  19. 19. Temperature ResponseTo fight pathogens the body will raise its temperature a coupledegrees above normal to try and kill them.
  20. 20. Fever helps to combat bacteriadue to the fact that Pathogens cannot survive high temperatures.
  21. 21. Proteins A variety of proteins provide a non-specificdefense from Pathogens
  22. 22. Interferon is a protein releaseby cells infected with a virus. (Its causes nearby cells to create an enzyme that prevents Viruses from making proteins and RNA)
  23. 23. White Blood Cells (Phagocytes)Neutrophils , macrophages and natural killer cells wait within tissue for pathogens to annihilate.
  24. 24. Neutrophils overwhelm anddestroy pathogens by sacrificingthemselves for wellbeing of the rest of the body
  25. 25. Macrophages consume and kill pathogens as well asclear the body of dead cells and debris.
  26. 26. Natural killer cells puncture the cell membranes ofpathogens, allowing liquid to rush in and make the cell burst
  27. 27. The Third Line of Defense
  28. 28. Acquired Immune Response The 3rd line of defense is Called “TheAcquired Immune Response” is a specific Immune response unlike the first andsecond line of defense. Its is an Immuneresponse that you gain by being infectedwith pathogens or virus’ and combating them.
  29. 29. Helper T-Cells activateboth cytotoxic T cells and B cells
  30. 30. Helper T-Cell
  31. 31. The helper T Cells recognize Virus’s that would otherwise go un-noticed. It then alerts the B-Cells. The B cells first analyze the virus thenthey construct a antibodythat is specifically for that one virus.
  32. 32. After the Virus is smothered in antibodies and cannot infect anything other cellsthe killer t cells are called to the seen to dispose of the incapacitated virus and kill the infected cells.
  33. 33. Armed Memory B-Cell
  34. 34. Antibodies are Immune System proteins that destroy pathogens
  35. 35. The End!!!By:Johnathan Baekgaard

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