B3 Flashcards
What are pathogens
Microorganisms that enter the body and cause disease
What get infected by pathogens
Plants and animals
What type of disease do pathogens cause
Communicable diseases which spread easily
Name the 4 types of pathogens
Bacteria, fungi, virus and Protists
How does bacteria make you feel ill
It produces toxins that damage your cells and tissues
What is bacteria
Small cells that reproduce rapidly inside the body
How big are bacteria cells
1/100 size of body cells
Why do viruses make you feel ill
Because they damage your cells
What are viruses not
Cells
How big are viruses
1/100th size of bacterium
What do viruses live
They reproduce rapidly by living inside your cells and replicating using your cells machinery
The cell then bursts releasing the new viruses
How are protists transferred
By a vector which doesn’t get the disease itself
