Microbes

BACTERIAVIRUSFUNGI Microbes Remember a living organism must be able to demonstrate that it can perform ALL the 7 life processes MRSGRENMRSGREN

BACTERIAVIRUSFUNGI Microbes Remember a living organism must be able to demonstrate that it can perform ALL the 7 life processes Movement Respriation Sensitivity Growth Reproduction 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.

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

Pathogen: an organism that causes a 1…………. Pathogenic microbes make poisons called 2…………… Toxins cause the 3…………. of Salmonella food poisoning. Toxins are a bit like poisons Most pathogenic microbes can be caught by other people: they are 4……………….. Reminder: some types of 5…… blood cell make antitoxins. Disease Disease disease. toxins. symptoms infectious. white diseaseinfectiouswhitesymptoms