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.,

Lungs

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