Respiratory system2
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Respiratory system2






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Respiratory system2 Respiratory system2 Presentation Transcript

  • Respiratory System 6th Grade Science
  • I. FunctionA. Take in oxygen from airB. Remove carbon dioxideC. Provides Energy for all cellsD. SmellE. Water balanceF. Communication
  • 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% View slide
  • III. PathwayA. Nose 1. Hairs and mucus – Clean Air 2. Nasal Membranes – Warm and moisten Air 3. Sinuses – Air chambers View slide
  • B. Uvula1. Close off nose during swallowing
  • C. Pharynx1. Throat i. Shared with dig.
  • D. Larynx1. Allows speech (vocal cords control)
  • 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
  • F. Bronchi1. Branches into each lung2. Continued until reached end
  • G. Alveoli1. Tiny sacs for gas exchange i. Oxygen into blood ii. Carbon dioxide into alveoli2. Numbers – 300 million3. Area – 7 meters2
  • 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
  • V. Speech
  • 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
  • B. Asthma1. Blocking of airways inappropriately 1. Inhalers used to relax muscles
  • C. Bronchitis1. Blocking of airways from pollution
  • E. Emphysema1. Lung damage – No gas exchange
  • F. Lung Cancer1. 400 people each day2. 53 cancer chemicals in cigarettes
  • G. Atherosclerosis1. Tar chemicals harden arteries i. Smokers have twice as many heart attacks