Trachea, Transports air into the bronchi from the mouth and nose. It is hard because it is made from rings of cartilage., Bronchus/bronchioles, Transports air from the trachea to the alveoli. They are smaller versions of the trachea., Intercostal muscles, Contracts to move the ribcage. They are found between the ribs., Alveoli, Tiny sacs where gas exchange occurs. They fill with air when we breath in., Diaphragm, Contracts to move the ribcage. It is found beneath the lungs.

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