FUNCTION OF THE LUNG

• The movement of the diaphragm helps the air go in and out of the lungs
• When air molecules are crowded outside


  They tend to get into the lungs where there are fewer air molecules (Inhalation)
• When air molecules are crowded inside the lungs


  They tend to get outside (Exhalation)
• Inhalation process

  1. Diaphragm contracts downward

  2. Rib muscles pull upward

  3. Air fills up the lungs
• Diaphragm movement

  Provides more breathing space in your chest
• Diaphragm movement


  Reduces the force on your lungs so the air will move in from the outside
• Exhalation process

  1. Diaphragm loosens up

  2. Ribs and lungs thrust in

  3. Gas is exhaled