i-How: Science - How does the respiratory system work?



The human thorax is made up of the following:

  • Trachea
  • Alveoli
  • Bronchi (Left & right bronchus)
  • Ribs
  • Intercostal muscles
  • Pleural membranes
  • Diaphragm


Respiratory System


  • The trachea splits into two bronchi (one leads to the left lung and the other to the right).
  • Pleural membranes surround each lung.
  • Cartilage rings in the walls of the trachea help to keep it open.
  • The bronchioles end in small sacs called alveoli. This is where the gas exchange takes place.


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