Diaphragm - Muscle that contracts to increase volume of the chest, Alveoli - Tiny air sacs increase surface area of lungs for maximum gas exchange, Lung - Organ in which gas exchange takes place, Trachea - Carries air to and from lungs, Bronchus - Carries air in and out of right or left lung, Intercostal Muscles - Contracts to pull ribcage up and out, Bronchioles - Carries air to the alveoli,

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