True: Humans need oxygen to breathe., Inhale is to take oxygen into your lungs through the nose., Exhale is to breathe the carbon dioxide out. , Oxygen expands the lungs when we breathe., Carbon dioxide is a gas we exhale., False: Nose, mouth, eyes, head and lungs are part of respiratory system., Humans have 4 lungs in the body., Oxygen goes to the lungs through the mouth., We exhale oxygen more than we inhale.,

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