Lungs, They help you to breathe, they are located in the chest., Diaphragm, As you breathe in, it contracts and flattens out to make room for your lungs., Oxygen, When you inhale you take me in., Carbon dioxide, When you exhale you breathe me out., Mouth and nose, Openings that pull air from outside your body into your respiratory system., Windpipe (trachea), Passage connecting your throat and lungs., Cilia, Tiny hairs that move in a wave-like motion to filter dust and other irritants out, Ribs, Bones that surround and protect your lungs and heart, Exercise, Do this regularly to help take care of your lungs., Secondhand smoke, This can damage your lungs..

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