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8th Grade Ch  4 Sec 1 Respiratory System
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8th Grade Ch 4 Sec 1 Respiratory System

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  • 1. Ch. 4 Sec. 1 Respiratory System
  • 2. Discover activity- How big can you blow up a balloon? Attempt Circumference 1. 2. 3. Average of 3 attempts
  • 3. respiration (cellular respiration)
    • process where glucose & oxygen undergo complex series of chemical reactions in cells
  • 4. respiration
  • 5. Systems working together
  • 6. path of air
  • 7. Path of air
    • NOSE
    • lined w/cilia & mucus- cleans, warms & moistens air
  • 8. 2. PHARYNX (throat)
  • 9.
    • 3. TRACHEA (windpipe)
    • made of cartilage
    • lined w/cilia & mucus
    • epiglottis prevents choking
  • 10.
    • 4. BRONCHI (bronchus)
    • direct air  lungs
  • 11.  
  • 12.
    • 5. LUNGS
    • main organs of resp. system
    • bronchi divide into smaller
    • branches (bronchioles)
  • 13.  
  • 14.
    • 6. ALVEOLI (alveolus)
    • ends of bronchioles
    • hollow air sacs surrounded
    • by capillaries
    • large surface area
    • gas exchange-oxygen & CO 2
    • (& water)
  • 15.  
  • 16. Respiratory System activities
  • 17.  
  • 18.  
  • 19. The Respiratory System [05:11]
  • 20. breathing
    • movement of air in & out lungs
  • 21.  
  • 22. How you breathe
    • diaphragm =
      • large, dome-shaped muscle that plays important role in breathing
  • 23.
    • inhale - diaphragm moves
          • rib muscles contract
    • exhale - diaphragm moves
          • rib muscles relax
    Animation of lungs breathing
  • 24.  
  • 25. How you speak
    • larynx ( voice box)
      • @ top of trachea
  • 26.
          • vocal cords
          • stretch across opening of larynx
          • air passes over vocal cords
          • vibration creates sound
  • 27.  
  • 28.  
  • 29. Time to test your knowledge
  • 30. respiration
    • process where glucose & oxygen undergo complex series of chemical reactions in cells
  • 31. breathing
    • movement of air in & out lungs
  • 32. Which do you inhale when you breathe: oxygen or carbon dioxide?
  • 33. When you inhale you breathe in oxygen . When you breathe out you exhale carbon dioxide .
  • 34. When you inhale, does your chest expand or contract?
  • 35. When you inhale, your chest expands . The diaphragm pulls downward.
  • 36. Are vocal cords located inside your larynx, trachea, or esophagus?
  • 37. The vocal cords are located inside your larynx . Hi! I’m Larry!
  • 38. What substances are exchanged in the alveoli?
  • 39.
    • oxygen
    • carbon dioxide
    • water
  • 40. Make a diagram of the respiratory system. pg. 115 Label nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli, lungs & diaphragm.

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