5th Grade-Ch. 3 Lesson 2 What is the Respiratory System
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  • 1. Ch. 3 Lesson 2 What is the respiratory system?
  • 2. Activity-pg. 80 What is your lung capacity? Name of student Diameter of ring (cm) Lung capacity (L) Your name
  • 3. Lung Capacity Activity
    • Question -How much air can I breathe in or blow out?
    • Purpose: To determine how much air different people can hold in their lungs
    • Hypothesis: If I blow a bubble as large as I can, then the volume of air in the bubble will be the same as the volume of air that was in my lungs.
    • Materials: black trash bag, bubble solution, plastic straw, metric ruler, masking tape
  • 4.
    • Procedure: on pgs. 80-81 in science book
    • Conclusion : I breathed out _______ of air. Compared to other students at my table, I breathed out (more or less) air.
  • 5. respiratory system:
    • Carries gases between outside air & blood
    • Many parts coated w/ mucus =
    • sticky, thick fluid that traps
    • dust, germs & other things in air
  • 6. trachea
    • tube that carries air from larynx  lungs
    • leads to 2 branches (bronchi)  goes in lungs
  • 7. bronchioles
    • small tubes in lungs
  • 8. larynx
    • vocal cords stretch across larynx
    • voice= vocal cords vibrate
  • 9. air sacs (alveoli)
    • thin walled pouches in lungs
    • oxygen enters blood & carbon dioxide leaves thru. capillaries
    capillary
  • 10. diaphragm
    • dome shaped muscle that forms bottom of chest
    • in hale (breathe in )- moves
    • ex hale (breathe out )- moves
  • 11. cilia
    • Tiny, hairlike structures on cells in linings of many parts of respiratory system
  • 12. Scanning electron microscope image of lung cilia
  • 13. nose mouth larynx pharynx trachea lungs bronchi bronchioles alveoli (air sacs) diaphragm
  • 14. When you hold your breath, carbon dioxide builds in your blood. Your brain senses this & sends a message to the diaphragm and rib muscles telling them to breathe.
  • 15. Respiratory System
  • 16. Time to review
  • 17. Are vocal cords located inside your larynx, trachea, or esophagus?
  • 18. The vocal cords are located inside your larynx .
  • 19. When you inhale, which direction does your diaphragm move?
  • 20. The diaphragm pulls downward .
  • 21. nose mouth larynx pharynx trachea lungs bronchi bronchioles alveoli (air sacs) diaphragm
  • 22. cilia
    • Tiny, hairlike structures on cells in linings of many parts of respiratory system
  • 23. trachea
    • Tube that carries air from larynx  lungs
    • Leads to 2 branches (bronchi)  lungs
  • 24. bronchioles
    • Small tubes in lungs
  • 25. ex hale
    • breathe out
  • 26. respiratory system:
    • Carries gases between outside air & blood
    • Many parts coated w/ _________
    • sticky, thick fluid that traps
    • dust, germs & other things in air
    mucus
  • 27. diaphragm
    • dome shaped muscle that forms bottom of chest
  • 28. in hale
    • breathe in
  • 29.