4th Grade-Ch. 5 Lesson 4 How does the Body Defend Itself

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4th Grade-Ch. 5 Lesson 4 How does the Body Defend Itself

  1. 1. Ch. 5 Lesson 4 How Does the Body Defend Itself?
  2. 2. microorganisms <ul><li>disease causing organisms </li></ul><ul><li>so small can only be seen w/ microscope </li></ul>
  3. 3. body’s defenses against microorganisms <ul><li>Skin </li></ul><ul><li>Breathing passages </li></ul><ul><li>Mouth </li></ul><ul><li>Stomach </li></ul>
  4. 4. pathogens <ul><li>organisms that cause some diseases </li></ul>
  5. 5. infectious disease <ul><li>disease that can pass from 1 organism to another </li></ul>
  6. 6. bacteria viruses pathogens microorganisms
  7. 7. Pictures Of Strep Throat The red flecks indicate a bacterial infection.
  8. 8. Many cases of food poisoning are caused by harmful E. coli bacteria
  9. 9. How to Prevent Infectious Diseases Getting plenty of rest. Getting plenty of exercise. Washing your hands often. Eating healthful foods.
  10. 11. How can some diseases be spread? Drawing of Observations Sheet Sheet D Sheet C Sheet B Sheet A
  11. 12. Discovery timeline Discovery Person Year Alexander Fleming Robert Koch Louis Pasteur Florence Nightingale Edward Jenner made 1 st antibiotic-penicillin infectious disease caused by certain pathogen showed micro-organisms cause disease demanded Army hospitals be clean created smallpox vaccine 1928 1882 1868 1854 1796
  12. 13. Edward Jenner The hand of a person infected with cowpox
  13. 14. Florence Nightingale
  14. 15. Louis Pasteur
  15. 16. Robert Koch
  16. 17. Alexander Fleming
  17. 18. immune system <ul><li>helps protect you from pathogens </li></ul><ul><li>incl. white blood cells </li></ul><ul><li>produces antibodies to certain diseases </li></ul>chicken pox
  18. 19. antibody <ul><li>chemical body makes to stop pathogens from infecting other cells </li></ul><ul><li>different antibody made for each pathogen </li></ul>
  19. 20. vaccine <ul><li>kind of medicine that protects you from a disease </li></ul><ul><li>signals your immune system to make antibodies to a certain pathogen </li></ul>

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