Breathing system

• Breathing


  1. Breathe in

  2. Breathe out

  3. Notice chest and belly movement

  4. Feel air passing from the nose

  5. Listen to sounds of breathing
• Parts of the respiratory system

  • Nose
  • Nasal passageways
  • Windpipe
  • Lungs
  • Diaphragm
• Nose and nasal passages

  Warm, damp, and clean the entering air
• Air movement through the respiratory system

  1. Air moves down through trachea

  2. Bronchi

  3. Bronchioles

  4. Alveoli
• Trachea


  Empty tube that serves as passageway of air into the lungs
• Bronchi


  Two branching tubes that connect to the alveoli
• Alveoli


  Air sacs that allow gas exchange in the lungs
• All organisms require energy to sustain life
• Not all organisms can use light energy directly for life activities
• Energy conversion in plants

  1. Capture sunlight

  2. Convert into chemical energy stored in food
• When people and other heterotrophic organisms eat food from producers and consumers

  Chemical energy stored in food is transferred to their bodies
• The respiratory system is in charge of supplying oxygen