the second line of defence
DESCRIPTION
The Second Line Of Defence. Rachel Payne. If the first line of defence, the skin fails, there is a secondary line of defence to protect your body These are made up of different types of white blood cells. Neutrophils. Neutrophils attack bacteria. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/1.jpg)
The Second Line Of Defence
Rachel Payne
![Page 2: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/2.jpg)
If the first line of defence, the skin fails, there is a secondary line of defence to protect your body
These are made up of different types of white blood cells
![Page 3: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/3.jpg)
Neutrophils
Neutrophils attack bacteria
They are like soldiers on a battlefield that rush to the enemy but get killed easily
They develop in bone marrow and only live a few days before self-destructing
![Page 4: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/4.jpg)
T Helper Cells
T helper cells are like bossesThey mark each pathogen and give signals for other cells
Each T helper marks each type of pathogen
![Page 5: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/5.jpg)
Cytotoxic T Cells
These are the killer cellsThey punch holes in the walls of pathogen cells so the contents ooze out
![Page 6: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/6.jpg)
Macrophages
Means ‘big eater’
These cells clean up the mess of dead cells
![Page 7: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/7.jpg)
Dendritic CellsThese are like spies
If they find an invading pathogen they bring back evidence to the T
helper cells
![Page 8: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/8.jpg)
B CellsThey produce antibodies which lock onto the
antigen of invading bacteria
![Page 9: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/9.jpg)
Suppressor T Cells
Once the infection is gone, the white blood cells need to calm down to prevent getting damaged.
The suppressor cells slow down or turn off the immune system
![Page 10: The Second Line Of Defence](https://reader030.vdocuments.net/reader030/viewer/2022033018/56816471550346895dd65618/html5/thumbnails/10.jpg)
Thankyou for watching my slideshow