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  1. 1. One of the characteristics of living organisms. Clue: O N E S P I R A T I R
  2. 2. Objective 1 <ul><li>To explain what respiration is </li></ul>
  3. 3. What is respiration? <ul><li>The release of energy </li></ul><ul><li>when food substances are broken down by </li></ul><ul><li>oxidation into simpler substances </li></ul><ul><li>such as carbon dioxide and water. </li></ul><ul><li>It is a chemical process. </li></ul><ul><li>DO YOU THINK PLANT RESPIRE? </li></ul>
  4. 4. Objective 2 <ul><li>To state the two types of respirations </li></ul><ul><li>To define what is aerobic respiration </li></ul>
  5. 5. Respiration <ul><li>Aerobic </li></ul><ul><li>Anaerobic </li></ul>There are two types of respiration:
  6. 6. Aerobic respiration <ul><li>The release of a relatively large amount of energy </li></ul><ul><li>by the breakdown of food substances </li></ul><ul><li>in the presence of oxygen </li></ul>Definition:
  7. 7. Objective 3 <ul><li>To state where aerobic respiration takes place </li></ul><ul><li>To construct the word equation for aerobic respiration </li></ul>
  8. 8. Aerobic Respiration occurs at the cell in the ….
  9. 9. Mitochondria Glucose O 2 Enzyme Co 2 Energy Water Enzyme
  10. 10. Aero bic Respiration <ul><li>Breakdown of food substances </li></ul><ul><li>Occurs in the mitochondria </li></ul><ul><li>Similar to combustion of fuel </li></ul><ul><li>Can be written in a word equation: </li></ul>Glucose Oxygen + Carbon dioxide + Relatively lots of energy Water +
  11. 11. Objective 6 <ul><li>To understand what is inspiration and expiration </li></ul><ul><li>To compare the composition of air in inspired and expired air </li></ul>
  12. 12. Inspiration Air breathed in
  13. 13. Inspiration <ul><li>Occurs when air is taken into the lungs </li></ul>
  14. 14. Expiration Air breathed out
  15. 15. Expiration <ul><li>Occurs when air passes out of the lungs </li></ul>
  16. 16. Make a Guess… <ul><li>From your knowledge state the differences between inspired and expired air. </li></ul>
  17. 17. Experiment 1 Inspired Air Expired Air 1 st hour 2 nd hour
  18. 18. Let’s Try… <ul><li>Lime water experiment </li></ul>
  19. 19. Experiment 2 Air Vacuum Pump Lime Water Expired Air
  20. 20. Experiment 3 Expired air Mirror Water droplets
  21. 21. Components of inspired and expired air 37 degree celsius Atmospheric temperature Temperature saturated variable Water Vapour About 79 About 79 Nitrogen About 4 About 0.03 Carbon dioxide About 16 About 21 Oxygen Expired air (%) Inspired air (%) Components (%)
  22. 22. Review Time <ul><li>Why are the amounts of oxygen, carbon dioxide and water vapour different in inspired and expired air? </li></ul><ul><li>Answer: Respiration uses oxygen and produces carbon dioxide and water. Thus, the expired air contains less oxygen and more carbon dioxide and water </li></ul>
  23. 23. You cannot live without doing it. BREATHING CLUE:
  24. 24. Objective 7 <ul><li>To define what breathing is </li></ul>
  25. 25. BREATHING AND RESPIRATION <ul><li>Is breathing and respiration the same? </li></ul><ul><li>Respiration is a chemical process. </li></ul><ul><li>In aerobic respiration, we need oxygen. </li></ul><ul><li>How do we get the oxygen? </li></ul><ul><ul><li>BREATHING </li></ul></ul><ul><li>Inhaling (breathe in) takes in oxygen </li></ul><ul><li>Exhaling (breathe out) takes out carbon dioxide and water </li></ul>
  26. 26. BREATHING <ul><li>Breathing is a mechanical process </li></ul><ul><li>DEFINITION OF BREATHING: </li></ul><ul><ul><li>Mechanical process by which oxygen enters the lungs from the air outside and carbon dioxide is removed from the lungs into the environment </li></ul></ul>
  27. 27. Objective 8 <ul><li>To know what happen during breathing in and out </li></ul>
  28. 30. BREATHING IN <ul><li>Ribs swing upwards and outwards </li></ul><ul><li>Diaphragm moves downward and flatten </li></ul>
  29. 31. BREATHING OUT <ul><li>Ribs return to original position </li></ul><ul><li>Diaphragm relaxes and arches upwards </li></ul>
  30. 32. Objective 9 <ul><li>To compare between respiration and breathing </li></ul>
  31. 33. Respiration and breathing Removes carbon dioxide produced during respiration Produces carbon dioxide Takes in oxygen from environment Uses oxygen obtained from breathing A process of gaseous exchange with the environment A process that breaks down food to release energy Take place in the lungs Take place in every cell Takes place all the time Takes place all the time Breathing Respiration
  32. 34. Objective 10 <ul><li>To understand how the human respiratory system works </li></ul>
  33. 36. Objective 11 <ul><li>To explain how plants take in oxygen and remove carbon dioxide </li></ul>
  34. 37. Plant Respiratory System <ul><li>Plants respire all the time just like other living organisms </li></ul><ul><li>During the day plant respire as well as photosynthesize </li></ul><ul><li>During the night photosynthesis cannot take place, plant only respire. </li></ul><ul><li>Oxygen is taken in and carbon dioxide is released through the stomata </li></ul>
  35. 38. Objective 12 <ul><li>To differentiate between photosynthesis and respiration </li></ul>
  36. 39. Takes place in mitochondria Takes place in chloroplasts End products – carbon dioxide and water End products – glucose and oxygen Uses glucose and oxygen Uses carbon dioxide and water Energy is released Takes in and stores energy Takes in oxygen Gives out oxygen Gives out carbon dioxide Takes in carbon dioxide Does not need chlorophyll Needs chlorophyll Takes place all the time Takes place only when there is light Takes place in all living things Takes place in plants only Process that breaks down food to release energy Process that makes food Respiration Photosynthesis