Respiratory system2

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Respiratory system2

  1. 1. Respiratory System 6th Grade Science
  2. 2. I. FunctionA. Take in oxygen from airB. Remove carbon dioxideC. Provides Energy for all cellsD. SmellE. Water balanceF. Communication
  3. 3. II. Air ExchangeA. Inhaled Air 1. Nitrogen 78% 2. Oxygen 21% 3. Carbon Dioxide 0.03%B. Exhaled Air 1. Nitrogen 78% 2. Oxygen 16% 3. Carbon Dioxide 4%
  4. 4. III. PathwayA. Nose 1. Hairs and mucus – Clean Air 2. Nasal Membranes – Warm and moisten Air 3. Sinuses – Air chambers
  5. 5. B. Uvula1. Close off nose during swallowing
  6. 6. C. Pharynx1. Throat i. Shared with dig.
  7. 7. D. Larynx1. Allows speech (vocal cords control)
  8. 8. E. Trachea1. Wrapped in cartilage ring to keep open2. Cilia to sweep stuff out of lungs i. Bring up to pharynx for swallowing ii. Contract violently if irritated – sneeze
  9. 9. F. Bronchi1. Branches into each lung2. Continued until reached end
  10. 10. G. Alveoli1. Tiny sacs for gas exchange i. Oxygen into blood ii. Carbon dioxide into alveoli2. Numbers – 300 million3. Area – 7 meters2
  11. 11. IV. BreathingA. Two step process 1. Inhalation i. Ribs move out ii. Diaphragm pulls down 2. Exhalation i. Ribs relax ii. Diaphragm relax iii. Pull in intestines
  12. 12. V. Speech
  13. 13. VI. Damage and DiseaseA. Smoking 1. ~1,100 deaths every day 2. 4,000 different chemicals i. Tar – Chemicals that coat airways ii. Carbon Monoxide – Replaces oxygen in blood iii. Nicotine – Addictive stimulant
  14. 14. B. Asthma1. Blocking of airways inappropriately 1. Inhalers used to relax muscles
  15. 15. C. Bronchitis1. Blocking of airways from pollution
  16. 16. E. Emphysema1. Lung damage – No gas exchange
  17. 17. F. Lung Cancer1. 400 people each day2. 53 cancer chemicals in cigarettes
  18. 18. G. Atherosclerosis1. Tar chemicals harden arteries i. Smokers have twice as many heart attacks

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