The tube through which air travels from the mouth and nose to the lungs. Also known as the windpipe. - trachea, The two tubes that lead from the trachea into the lungs. - bronchi (singular: bronchus), Small tubes that lead from the bronchi to the alveoli. - bronchioles (singular: bronchiole), Tiny air sacs arranged in clusters throughout the lungs. They provide a large surface area for gas exchange to take place. - alveoli (singular: alveolus), Muscles found between the ribs. They contract to help move air into and out of the lungs. - intercostal muscles, A dome-shaped, flat muscle that sits underneath the ribcage. It contracts to change the volume of the chest, causing the movement of air into and out of the lungs. - diaphragm, The bones that protect the organs in the chest. - ribs, A pair of organs through which air is moved in and out when we breathe. - lungs,

Function of structure in the human gaseous exchange system (function to structure)

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