Pathogens
- Created by: Snakeruler
- Created on: 05-05-14 16:07
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- Pathogens
- Pathogens are...
- An organism which causes disease
- Micro organisms, and some larger organisms ie Parasites
- Include some bacteria, some fungi, and all viruses
- To gain access, they must penetrate one of the following interfaces...
- Damaged skin
- Blood clots form to prevent the entry of pathogens
- Respiratory system
- The body uses mucus, and tiny hairs (cilia) trap the pathogen and move it up to the mouth
- Digestive system
- Stomach acid and enzymes will kill most pathogens
- Damaged skin
- Once in the body, pathogens can cause disease in 2 ways...
- Production of toxins
- Cell damage
- Rupturing host cells to release nutrients inside them
- Breaking down nutrients inside the cell for their own use.
- Replicating in the cell and bursting them
- Pathogens are...
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