Pathogens, Digestive system

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  • Pathogens
    • is any micro-organism that cause diseases
    • interfaces; digestive and gas-exchange system
    • cause disease by damaging host cells and produce toxins
    • Epidemiology is the study of pattern & # of cases of diseases
  • smoking(tobacco), poor diet, obesity, exercise, sunlight
    • Cancer!
  • smoking, high blood pressure, high cholesterol,obesity, diet, exercise
    • Lifestyle & Health
      • Risk; probability damage to health will occur
      • smoking(tobacco), poor diet, obesity, exercise, sunlight
        • Cancer!
      • other factor; environment, Age, Genetic, Sex
    • CHD
  • Digestive system
    • 6. Large intestine absorb WATER, dry food becomes faeces
  • 1. salivary glands; secret amylase
    • Digestive system
      • 6. Large intestine absorb WATER, dry food becomes faeces
  • 2. Esophagus; transport food from mouth to stomach
    • walls produce mucus prevent stomach being digest by enzymes
    • 5. small intestine; long muscular tube, further digest FOOD.
      • 7. Rectum; final section of intestine, store faeces
        • Anus, remove faeces (egestion)
        • 4. Pancreas; large gland, produces pancreatic juice
          • Chemical process in which large molecules are hydrolysed by enzymes to produce smaller molecules
            • Physical digestion; large molecules broken into smaller by teeth etc

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