Metabolism

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Across
  1. 4. This is a gas molecule that we exhale as a waste product
  2. 5. This body system inhales oxygen and exhales CO2
  3. 6. The smallest unit of life
Down
  1. 1. come from this larger molecule
  2. 2. This is a molecule that gets broken down from starches
  3. 3. This body system breaks food down into smaller molecules