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Vocabulary uint 7

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
digestive tract   the food tube open at both ends  
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peristalsis   the movement of food along the food tube by muscles  
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esophagus   the part of the food tube between the mouth and the stomach  
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mechanical   the breaking down food by the teeth and tongue  
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saliva   a liquid found in the mouth  
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enzyme   a chemical substance that helps digest food  
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physical   A change in the size or shape of something  
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gastric   a liquid produced by the stomach  
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pepsin   enzymes found in gastric juice  
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casein   a milk protein  
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villi   tiny finger like parts that stick out from the walls of the small inestine  
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Lacteals   the body uses foods that are in the blood stream  
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