Bio B3 Diseases

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How are diseases spread? 

Human/Animals: 

  • Direct contact
  • Airbourne
  • Water
  • Blood (bodily fluids)
  • Food

Plants:

  • Wind (seeds/pollen)
  • Soil
  • Water
  • Insects/birds
  • Sap

How diseases affect the cells?

Bacteria ~ toxins are produced that damage cells and tissues directly and make people ill.

Virus ~ live and reproduce inside cells, damaging the cells.

How to reduce the

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