Nose - Brings air into the body, Trachea - Airway that transports Oxygen and Carbon dioxide, Lungs - The organ that expands and contracts during breathing, Diaphragm - Thick muscle that pushes up on the lungs to push the air out., Alveoli - Tiny air sacs in the lungs that increase surface area and allow gasses to diffuse into the capillaries,

Respiratory System Structure & Function

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