Disease and Pathogens

Mindmap about how disease is caused by pathogens

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  • Created by: LucyD
  • Created on: 16-02-14 11:02
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  • Disease - caused by pathogens
    • Pathogens
      • Cause infectious diseases
        • Penetrate an organisms interface with the environment
        • Must enter body to cause disease through an organisms surface of contact with the environment
          • Nose, cut, eyes
      • Definition: Microorganism which causes disease
        • Bacteria, fungi, viruses
    • Interfaces
      • Gas Exchange System
        • Air containing pathogens is breathed in
          • Trapped in mucus lining the lung epithelium
            • Cilia that move/beat the mucus up into the trachea to the mouth to remove it.
          • Some pathogens reach the alveoli > invade cells causing damage
      • Skin
        • If skin becomes damaged, pathogens enter bloodstream
          • Blood clots preventing pathogen entering
          • Some enter before it clots
      • Digestive System
        • Food and drink containing pathogens
          • Killed by acid in the stomach
          • Some survive and pass through the intestines and invade cells of the gut wall
    • How pathogens cause disease
      • Pathogens
        • Cause infectious diseases
          • Penetrate an organisms interface with the environment
          • Must enter body to cause disease through an organisms surface of contact with the environment
            • Nose, cut, eyes
        • Definition: Microorganism which causes disease
          • Bacteria, fungi, viruses
      • Produce toxins
        • Bacteria release toxins
          • Tetanus produces toxin which clocks function of nerve cells.
            • Causes muscle spasms
      • Damages cells
        • Damages Hosts cells which cell pathogen is invading and reproducing inside
          • 1) Ruptures and releases nutrients inside of them
          • 2) Breaks down nutrients inside the cell for their own use
            • Starves and kills the cell
          • Replicates inside cells and bursts them when they are released
            • Viruses

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