1) What is the esophagus known as? a) Food pipe b) Mouth c) Intestine d) Kidney 2) What is the first stage of the digestive system? a) Absorption b) Swallowing c) Chewing 3) What is Pepsin? a) A organ in the digestive system b) An enzyme in the stomach that breaks down proteins c) An acid in the mouth during chewing d) All of the above 4) Where does the food travel after the stomach? a) The esophagus b) The kidneys c) The small intestine d) The large intestine 5) The liver secretes what?  a) Blood b) Water c) Hormones d) Bile 6) Large materials not absorbed become what? a) Blood b) Waste c) Enzymes d) Nothing 7) The large intestine produces what? a) Antibodies b) Acid c) Oxygen d) Carbon

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