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Chapter 9: Disease

Chapter 9: Disease. Unit C: Disease Defence and Human Health. 9.1 Causes of Human Disease. Disease prevents the body from functioning normally Through the invention of the microscope, Louis Pasteur and Robert Koch found and identified micro-organisms called microbes

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Chapter 9: Disease

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  1. Chapter 9: Disease Unit C: Disease Defence and Human Health

  2. 9.1 Causes of Human Disease • Disease prevents the body from functioning normally • Through the invention of the microscope, Louis Pasteur and Robert Koch found and identified micro-organisms called microbes • Microbes that cause disease are called pathogens • Pathogens are one cause for disease • What are some other causes?

  3. 9.1 Causes of Human Disease • Bacteria • They are EVERYWHERE!!! • On your skin, in the air your breathe, in your hair. • Bacteria can harmful and beneficial. • Bacteria can reproduce quickly but they need the right environment. • 1. • 2. • 3.

  4. 9.1 Causes of Human Disease • Viruses • found anywhere that there are cells • Viruses are smaller than bacteria and reproduce by taking over cells in the body. • Protists • Single celled organisms that share some characteristics with both animals and plants • Giardia is a common protist – aka Beaver Fever • Fungi • Ex: molds, yeast, and mushrooms • Some fungi are parasites and live on host organisms

  5. 9.2 Communicable and Non-communicable Disease • Communicable vs. Non-communicable • What are they? How are they different? • Importance of a clean environment • Diseases can spread through air, water, food, and contact • Conditions in certain environments need to be extremely clean to stop pathogens from spreading • Ex: Restaurants – food handling • Why is it important to handle food properly in restaurants?

  6. 9.2 Communicable and Non-communicable Disease • How do you get a non-communicable disease? • What are some factors? • Bad environmental conditions • Poor diets • Unhealthy lifestyles • Genetics

  7. 9.3 Who is most likely to get sick? • People in Canada live to almost an average age of 80 • People in Sierra Leone (Africa) live to an average age of 33 • Why is that? • What are some of the risk factors with getting sick? • Eating properly • Smoking • Not having a toilet • Others?

  8. 9.4 Stop Disease in its Tracks • Preventing food poisoning • Food poisoning (staph bacteria) enters food when coughing, sneezing, or handling food without washing your hands properly • Food Preservation • Canning, salting, freezing, drying • Examples? • Aseptic Methods • Free of pathogens/sterile

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