Transcript Microbes

Microbes
Microbes
M
BACTERIA
VIRUS
FUNGI
R
S
G
R
Remember a living organism must be able to
demonstrate that it can perform ALL the 7 life processes
E
N
Microbes
BACTERIA
VIRUS
FUNGI
Movement
Respriation
Sensitivity
Growth
Reproduction
Remember a living organism must be able to
demonstrate that it can perform ALL the 7 life processes
Excretion
Nutrition
Microbes and Disease
There are three main types of microbes
VIRUS
BACTERIA
FUNGI
Microbes and Disease
There are three main types of microbes
VIRUS- common cold, measles, polio
BACTERIA- Tuberculosis
FUNGI-
Athlete’s foot
Bacteria multiply very
rapidly. Two can very
quickly, become four then
eight and so on.
When bacteria enter our
bodies they may produce
toxins. These poisonous
toxins can make us feel
unwell.
Not all Bacteria are
pathogens
Bacteria
Virus
The virus attaches itself to
the cell membrane of the
host cells.
Ciliated cells found in the air passages
It the injects its genetic
material (DNA) into the host
cell.
It the injects its genetic
material (DNA) into the host
cell.
The DNA material then makes
copies of itself by using the cell’s
enzymes and raw materials.
Each DNA then makes its
own protein coat around itself
forming a new virus.
The cell then swells with all these new viruses and it
bursts letting all the viruses free to invade new cells.
The cells that have been damaged gives rise to the symptoms that we
experience with the disease.
All viruses are pathogens and can affect animals and plants
Fighting disease
Fighting disease
Disease
Disease
• Pathogen: an organism that causes a 1…………
disease. .
• Pathogenic microbes make poisons called
2……………
toxins.
• Toxins cause the 3………….
symptoms of Salmonella food
poisoning. Toxins are a bit like poisons
• Most pathogenic microbes can be caught by other
people: they are 4……………….
.
infectious.
• Reminder: some types of 5……
white blood cell make
antitoxins.
disease
infectious
white
symptoms