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(Biology) Ch8: Respiratory System

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Across
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A gas necessary for life that is found in the air
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A part of the body that has a specific job
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A gas that is produced when people and animals breathe out
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To move air into and out of the lungs
Down
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Organs that people and other animals use to breathe air
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Tubes that carry air all around the lungs
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A roll of paper filled with tobacco to smoke
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The path that air takes in and out of the lungs