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Chapter 17 The Digestive System The Digestive System Alimentary canal or GI tract Extends from mouth to anusâ9 m (29 feet) Involved in digestion, absorption and metabolism…

2007-2008 BIOTECHNOLOGY B. BIOLOGICAL FUELS 1 The need for biological fuels 2 Raw materials These include wastes and crops; wastes Dry Wastes Wet wastes Crops In the future,…