Disease and resistance
Teacher recommended
?- Created by: Georgia
- Created on: 29-04-13 19:26
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- Disease and resistance
- Bacteria
- many shapes and sizes
- largest is ten micrometers long.
- Are living cells
- Can multiply fast in good conditions
- release toxins and poisions into the body
- makes us ill
- many shapes and sizes
- Viruses
- Smaller than bacteria
- amoung the smallest organisms
- can only reproduce inside host cells
- damaging when does so
- take over the cell
- making hundreds of thousands of copies
- fills the host cell untill burst
- goes through bloodstream, airways, etc
- Smaller than bacteria
- Population growth of microorganisms
- in the right conditions bacteria can mutiply fast
- warmth, moisture, nutrients
- the body can provide this
- in a cut
- each bacteria split into two every 20 mins
- in the right conditions bacteria can mutiply fast
- defence
- white blood cells
- produce antitoxins that neutralise the toxins released by pathogens.
- produce antibodies to destroy pathogens
- ingest pathogens
- ingest pathogens and destroy them
- several types
- two main groups
- produces antibodies againts microorganisms
- surrounds and digests bacteria
- two main groups
- memory cells
- type of white blood cell
- respond quickly when meet a microorganism for a second time
- produce aintbodys to destroy the microorganism before your ill
- white blood cells
- Bacteria
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