B1 keeping healthy and pathogens

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  • Keeping healthy
    • Microorganisms that cause diseases are known as pathogens
      • Bacteria are single celled organisms, mostly harmless
      • Viruses are smaller than bacteria and cause disease
    • Defence mechanisms
      • Droplet infection
        • tiny droplets full of pathogens enter your breathing system
      • contaminated food/drink
        • raw or undercooked food let pathogens get straight to your gut
      • breaks in the skin
        • pathogens enter in breaks in the skin, platelets form clots at the site to prevent infection
    • Changing pathogens
      • bacteria are increasingly becoming immune to antibiotics
        • mutations in the bacteria


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