How do plants and animals breathe


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How do plants and animals breathe

  1. 1. Submitted by Ms Gooi Shu Wan Pei Chun Public School
  2. 2. <ul><li>Topic: Living Things Need Air </li></ul><ul><li>Sub-topics: How do plants and animals breathe? </li></ul><ul><li>Level: Primary 4 </li></ul><ul><li>Number of periods: 2 (1 hour) </li></ul><ul><li>Specific Instructional Objectives </li></ul><ul><li>After completing the lesson, pupils will be able to: </li></ul><ul><li>- compare how plants, fish and mammals take in oxygen and give out carbon dioxide. </li></ul>
  3. 3. <ul><li>Key concepts </li></ul><ul><li>- Plants exchange gases with its environment through stomata. </li></ul><ul><li>- Fish breathe using gills. </li></ul><ul><li>- Mammals breathe using their lungs. </li></ul><ul><li>Process Skills </li></ul><ul><li>- Observing </li></ul><ul><li>- Comparing </li></ul>
  4. 4. Why do living things need air?
  5. 5. We need OXYGEN to carry out RESPIRATION.
  6. 6. What is RESPIRATION ?
  7. 7. <ul><ul><li>Respiration is the process which releases energy from the food consumed. </li></ul></ul><ul><ul><li>It uses oxygen and gives off carbon dioxide . </li></ul></ul>
  8. 8. <ul><li>Nitrogen </li></ul><ul><li>Oxygen </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Water vapour </li></ul>more less <ul><li>Nitrogen </li></ul><ul><li>Oxygen </li></ul><ul><li>Carbon dioxide </li></ul><ul><li>Water vapour </li></ul>more less more less
  9. 9. <ul><ul><li>Plants exchange gases with the surrounding air through the stomata . </li></ul></ul><ul><ul><li>Closed stoma </li></ul></ul><ul><ul><li>Open stoma </li></ul></ul>Pictures courtesy of MicroAngela
  10. 10. <ul><ul><li>Oxygen </li></ul></ul><ul><ul><li>Oxygen </li></ul></ul><ul><ul><li>Carbon dioxide </li></ul></ul><ul><ul><li>Carbon dioxide </li></ul></ul>
  11. 11. <ul><ul><li>Mammals breathe by using their lungs . </li></ul></ul>
  12. 12. Oxygen absorbed by blood vessels in the lungs. Carbon dioxide leaves the blood vessels and goes into the air we breathe out. Picture courtesy of Encyclopaedia Britannica <ul><ul><li>What about the mammals that live in water? </li></ul></ul>Air moves through the windpipe and other tubes. Air enters the body through the nose and mouth. Air leaves the body through the nose and mouth.
  13. 14. <ul><ul><li>Dolphin </li></ul></ul><ul><ul><li>Blowhole </li></ul></ul>
  14. 15. <ul><ul><li>Whale </li></ul></ul>Copyright © 1999-2006 <ul><ul><li>Blowhole </li></ul></ul>
  15. 16. <ul><ul><li>Dugong / Sea Cow </li></ul></ul><ul><ul><li>Porpoise </li></ul></ul>Photo courtesy of National Geographic © Great Barrier Reef Marine Park Authority 2005 Photo courtesy of Encyclopaedia Britannica
  16. 17. <ul><ul><li>Seal </li></ul></ul>Photo courtesy of <ul><ul><li>Breathing hole </li></ul></ul>
  17. 18. <ul><ul><li>Fish breathe by gills . </li></ul></ul><ul><ul><li>Gills </li></ul></ul><ul><ul><li>Gill has a large surface area and a lot of blood vessels . </li></ul></ul>
  18. 19. <ul><ul><li>Carbon dioxide is removed from blood vessels through the gills. </li></ul></ul><ul><ul><li>Oxygen in the water absorbed into blood vessels through the gills </li></ul></ul>
  19. 20. <ul><ul><li>Match the following living things to the parts they use for breathing. </li></ul></ul>stomata gills lungs
  20. 21. <ul><ul><li>That’s correct. </li></ul></ul><ul><ul><li>Shark is a fish and it breathes through gills . </li></ul></ul>Next question <ul><ul><li>Gills </li></ul></ul>
  21. 22. stomata gills lungs
  22. 23. <ul><ul><li>That’s correct. </li></ul></ul><ul><ul><li>Elephant is a mammal and it breathes using its lungs . </li></ul></ul>Next question
  23. 24. stomata gills lungs
  24. 25. <ul><ul><li>That’s correct. </li></ul></ul><ul><ul><li>Sunflower is a plant and it breathes through stomata . </li></ul></ul>Next question
  25. 26. stomata gills lungs Picture courtesy of National Geographic
  26. 27. <ul><ul><li>That’s correct. </li></ul></ul><ul><ul><li>Walrus is a mammal and it breathes using its lungs . </li></ul></ul>Summary Picture courtesy of National Geographic
  27. 28. <ul><ul><li>That’s incorrect. Please try again. </li></ul></ul>
  28. 29. <ul><ul><li>That’s incorrect. Please try again. </li></ul></ul>
  29. 30. <ul><ul><li>That’s incorrect. Please try again. </li></ul></ul>
  30. 31. <ul><ul><li>That’s incorrect. Please try again. </li></ul></ul>
  31. 32. ENERGY CARBON DIOXIDE RESPIRATION. OXYGEN <ul><li>During respiration, </li></ul><ul><li>is released from the food consumed. </li></ul>? <ul><li>We take in and </li></ul><ul><li>give out . </li></ul>? ? <ul><li>Living things need oxygen to carry out </li></ul>?
  32. 33. STOMATA. GILLS. LUNGS. <ul><li>Plants exchange gases with the environment through </li></ul>? <ul><li>Fish breathe by using </li></ul>? <ul><li>Mammals breathe by using their </li></ul>?